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Bitcoin Newcomers FAQ - Please read!

Welcome to the /Bitcoin Sticky FAQ

You've probably been hearing a lot about Bitcoin recently and are wondering what's the big deal? Most of your questions should be answered by the resources below but if you have additional questions feel free to ask them in the comments.
It all started with the release of the release of Satoshi Nakamoto's whitepaper however that will probably go over the head of most readers so we recommend the following videos for a good starting point for understanding how bitcoin works and a little about its long term potential:
Some other great resources include Lopp.net, the Princeton crypto series and James D'Angelo's Bitcoin 101 Blackboard series.
Some excellent writing on Bitcoin's value proposition and future can be found at the Satoshi Nakamoto Institute.
Some Bitcoin statistics can be found here and here. Developer resources can be found here. Peer-reviewed research papers can be found here.
Potential upcoming protocol improvements and scaling resources here and here.
The number of times Bitcoin was declared dead by the media can be found here (LOL!)

Key properties of Bitcoin

Where can I buy bitcoins?

Bitcoin.org and BuyBitcoinWorldwide.com are helpful sites for beginners. You can buy or sell any amount of bitcoin (even just a few dollars worth) and there are several easy methods to purchase bitcoin with cash, credit card or bank transfer. Some of the more popular resources are below, also check out the bitcoinity exchange resources for a larger list of options for purchases.
Here is a listing of local ATMs. If you would like your paycheck automatically converted to bitcoin use Bitwage.
Note: Bitcoins are valued at whatever market price people are willing to pay for them in balancing act of supply vs demand. Unlike traditional markets, bitcoin markets operate 24 hours per day, 365 days per year. Preev is a useful site that that shows how much various denominations of bitcoin are worth in different currencies. Alternatively you can just Google "1 bitcoin in (your local currency)".

Securing your bitcoins

With bitcoin you can "Be your own bank" and personally secure your bitcoins OR you can use third party companies aka "Bitcoin banks" which will hold the bitcoins for you.
Note: For increased security, use Two Factor Authentication (2FA) everywhere it is offered, including email!
2FA requires a second confirmation code to access your account making it much harder for thieves to gain access. Google Authenticator and Authy are the two most popular 2FA services, download links are below. Make sure you create backups of your 2FA codes.
Google Auth Authy OTP Auth
Android Android N/A
iOS iOS iOS

Watch out for scams

As mentioned above, Bitcoin is decentralized, which by definition means there is no official website or Twitter handle or spokesperson or CEO. However, all money attracts thieves. This combination unfortunately results in scammers running official sounding names or pretending to be an authority on YouTube or social media. Many scammers throughout the years have claimed to be the inventor of Bitcoin. Websites like bitcoin(dot)com and the btc subreddit are active scams. Almost all altcoins (shitcoins) are marketed heavily with big promises but are really just designed to separate you from your bitcoin. So be careful: any resource, including all linked in this document, may in the future turn evil. Don't trust, verify. Also as they say in our community "Not your keys, not your coins".

Where can I spend bitcoins?

Check out spendabit or bitcoin directory for millions of merchant options. Also you can spend bitcoin anywhere visa is accepted with bitcoin debit cards such as the CashApp card. Some other useful site are listed below.
Store Product
Gyft Gift cards for hundreds of retailers including Amazon, Target, Walmart, Starbucks, Whole Foods, CVS, Lowes, Home Depot, iTunes, Best Buy, Sears, Kohls, eBay, GameStop, etc.
Spendabit, Overstock and The Bitcoin Directory Retail shopping with millions of results
ShakePay Generate one time use Visa cards in seconds
NewEgg and Dell For all your electronics needs
Bitwa.la, Coinbills, Piixpay, Bitbill.eu, Bylls, Coins.ph, Bitrefill, LivingRoomofSatoshi, Coinsfer, and more Bill payment
Menufy, Takeaway and Thuisbezorgd NL Takeout delivered to your door
Expedia, Cheapair, Destinia, Abitsky, SkyTours, the Travel category on Gyft and 9flats For when you need to get away
Cryptostorm, Mullvad, and PIA VPN services
Namecheap, Porkbun Domain name registration
Stampnik Discounted USPS Priority, Express, First-Class mail postage
Coinmap and AirBitz are helpful to find local businesses accepting bitcoins. A good resource for UK residents is at wheretospendbitcoins.co.uk.
There are also lots of charities which accept bitcoin donations.

Merchant Resources

There are several benefits to accepting bitcoin as a payment option if you are a merchant;
If you are interested in accepting bitcoin as a payment method, there are several options available;

Can I mine bitcoin?

Mining bitcoins can be a fun learning experience, but be aware that you will most likely operate at a loss. Newcomers are often advised to stay away from mining unless they are only interested in it as a hobby similar to folding at home. If you want to learn more about mining you can read more here. Still have mining questions? The crew at /BitcoinMining would be happy to help you out.
If you want to contribute to the bitcoin network by hosting the blockchain and propagating transactions you can run a full node using this setup guide. If you would prefer to keep it simple there are several good options. You can view the global node distribution here.

Earning bitcoins

Just like any other form of money, you can also earn bitcoins by being paid to do a job.
Site Description
WorkingForBitcoins, Bitwage, Cryptogrind, Coinality, Bitgigs, /Jobs4Bitcoins, BitforTip, Rein Project Freelancing
Lolli Earn bitcoin when you shop online!
OpenBazaar, Purse.io, Bitify, /Bitmarket, 21 Market Marketplaces
/GirlsGoneBitcoin NSFW Adult services
A-ads, Coinzilla.io Advertising
You can also earn bitcoins by participating as a market maker on JoinMarket by allowing users to perform CoinJoin transactions with your bitcoins for a small fee (requires you to already have some bitcoins.

Bitcoin-Related Projects

The following is a short list of ongoing projects that might be worth taking a look at if you are interested in current development in the bitcoin space.
Project Description
Lightning Network Second layer scaling
Blockstream, Rootstock and Drivechain Sidechains
Hivemind and Augur Prediction markets
Tierion and Factom Records & Titles on the blockchain
BitMarkets, DropZone, Beaver and Open Bazaar Decentralized markets
JoinMarket and Wasabi Wallet CoinJoin implementation
Coinffeine and Bisq Decentralized bitcoin exchanges
Keybase Identity & Reputation management
Abra Global P2P money transmitter network
Bitcore Open source Bitcoin javascript library

Bitcoin Units

One Bitcoin is quite large (hundreds of £/$/€) so people often deal in smaller units. The most common subunits are listed below:
Unit Symbol Value Info
bitcoin BTC 1 bitcoin one bitcoin is equal to 100 million satoshis
millibitcoin mBTC 1,000 per bitcoin used as default unit in recent Electrum wallet releases
bit bit 1,000,000 per bitcoin colloquial "slang" term for microbitcoin (μBTC)
satoshi sat 100,000,000 per bitcoin smallest unit in bitcoin, named after the inventor
For example, assuming an arbitrary exchange rate of $10000 for one Bitcoin, a $10 meal would equal:
For more information check out the Bitcoin units wiki.
Still have questions? Feel free to ask in the comments below or stick around for our weekly Mentor Monday thread. If you decide to post a question in /Bitcoin, please use the search bar to see if it has been answered before, and remember to follow the community rules outlined on the sidebar to receive a better response. The mods are busy helping manage our community so please do not message them unless you notice problems with the functionality of the subreddit.
Note: This is a community created FAQ. If you notice anything missing from the FAQ or that requires clarification you can edit it here and it will be included in the next revision pending approval.
Welcome to the Bitcoin community and the new decentralized economy!
submitted by BitcoinFan7 to Bitcoin [link] [comments]

MXC AMA Recapitulation-Filenet

MXC AMA Recapitulation-Filenet

https://preview.redd.it/6u8t4y55nay41.png?width=1200&format=png&auto=webp&s=6ad7775ac648def445571a6a80e285f1c152a803

Guest: FN Global Community Rep,Andrew Chan

Host: Molly

Introduction:

Andrew:
Nice to meet you guys here,it's my honor to stand here speach for Filenet.Filenet(FN) is the world's first public chain of distributed storage application who has lauchned the mainet, and is also the world's first public chain of distributed storage application using DPOS + POC consensus mechanism.Filenet is dedicated to storing and distributing valuable content, rewarding miners in the form of mining to contribute idle bandwidth and storage. The mission of Filenet is to establish a powerful distributed data service system by connecting all idle storage to form, so any storage device that can connect to the Internet can participate in mining. Generally, Filenet is a super cloud system based on distributed storage and content sharing.

Questions from community:

Molly: Q1.What are the benefits of the FN project for business? What is the main role FN plays in business for five validation and security?
Andrew:
As we said just now,Filenet(FN) is the world's first public chain of distributed storage.
Filenet is dedicated to storing and distributing valuable content. The system provides a file promotion system. The more data is retrieved, the more popular it becomes, and the file can be mined.The DAO mechanism adopted by Filenet, in the system of Filenet, users need not pay for uploading and downloading, which greatly reduces the cost of enterprise server and bandwidth.Besides that Filenet is used to retrieve and distribute mining patterns, pledge a certain amount of deposit and provide a certain amount of storage space to participate in mining. The higher the miner's contribution, the higher the probability of a block.
Filenet is a leader in the field of distributed storage because of its unique consensus mechanism, business model, economic model, ecological strategy and governance structure, enabling blockchain storage to break out of the shackles and develop into a new format, and providing a key role for the development of other blockchain storage systems.
On the level of consensus, Filenet adopts the DPOS+POC mechanism as the consensus mechanism for distribution in the context of POC storage and mining, avoiding the direct contradiction between equipment efficiency and resource allocation, and greatly improving the mining mode in the blockchain 3.0 era.
The specific operation process of DPOS algorithm is that stakeholders, namely the Token holders and miners, vote to select Filenet Super Nodes through the election program, and then the Super Nodes in the block will be randomly pseudorandomly, and the Filenet Super Nodes can choose whether to produce blocks within a specified time.
As for smart contracts, Filenet is a common chain for developers that provides special programming primitives for DApp to interact with stored data.
These primitives are contained within the EVM (ethereum intelligent contract virtual machine). Thus, information about the location of data, storage nodes, and miners can also be accessed in smart contracts.
The world's first distributed storage DApp "Ztiao" developed based on Filenet network is now on the market. All chat data in this application will be stored in a fragmented form at any node in the world, transferred by private key, and the ecology in the application will be circulated and settled with Fn as payment token.
Filenet's smart contracts apply primarily to miners' coin holdings.The smart contracts we have developed may be rapidly realized through EVM (ethereum smart contract virtual machine) and solsea.
Filenet itself has the potential to implement an intelligent contract mechanism, and we believe that future versions of EVM and WASM will naturally integrate with the capabilities of Filenet and allow other main chains to benefit from Filenet.
In terms of data structure, the Filenet block saves all data trace parameters, and the data uploaded to Filenet is of various types and large quantities. While traditional linked list structures make blocks redundant and complex to express, Filenet USES a block chain data structure with Merkle tree and DAG (directed acyclic graph) structure.
The DAG structure is more flexible, more powerful, and faster than the traditional blockchain chain structure, greatly improving the efficiency of block packaging, thereby improving the performance of the Filenet network.
The Merkle tree does not require complete block information, but only the key Merkle node information to verify the block chain number filenet. IO page 10, a total of 24 data, which makes the node lighter and more energy and resources are devoted to business processing and providing services for the filenet network.
At the same time, Merkle tree can also simplify the verification process and further improve network performance.
Molly: Q2.Why does Filenet use the DPOS + POC consensus mechanism? What is the advantage?
Andrew:
As we all know,the core element of blockchain technology is the consensus mechanism. Currently, the most commonly used mechanisms include PoW (Proof-of-Work), PoS (Proof-of-Stake), DPoS (Delegated-Proof-of Stake), and PoC (Proof-of-Contribution). Proof of Work requires miners to solve complex cryptographic math problems and relies on computing power. The advantage of the system is that it is secure and reliable. Disadvantages are its limited capacity and the possibility of “51% attacks”. The Proof of Stake consensus mechanism selects miners according to how many coins he or she has. An immediate advantage is its low resource consumption. However, it opens itself to a range of attacks, such as nothing-at-stake, and also results in centralization since wealth brings more rewards and more decision-making power. In DPoS, the majority of people holding voting rights authorize a small number of nodes to act for them. The system’s merits are its high efficiency, throughput capacity and concurrency. However, the power is then concentrated in the hands of a few nodes, which is not safe. Proof of Contribution allocates mining and validating rights according to the contributions made by the nodes. The advantage of this system is that it does not waste resources thanks to its concept of selection based on resources provided to network. A disadvantage is that the calculation of contributions depends on specific scenarios. In the era of Blockchain 3.0, the consensus mechanisms are to advance under the principles of economy of resources, security focus and scalability, throughput capacity and concurrency.

https://preview.redd.it/krjv4rm9may41.png?width=1066&format=png&auto=webp&s=40875d9f7c76c5259faba1ad09f2396447231fa5
Molly: Q3.What is the main reason behind the formation of FN? Why do you think coins like FN should be in the Marketplace?
Andrew:
As I just said,Filenet is an IPFS incentive layer to reward miners for sharing their storage and networking resources.
Filenet is also a token which powers a distributed certification mechanism. It creates a cloud-level system for content-sharing dedicated to storing and distributing valuable content on IPFS,demand leaders to results. Filenet solve the problem of data distribution and storage.Why coins like FN should be in the marketplace?
This is easy to understand,why bitcoin should be in the market?All coins can be in the market for just one reason-the consensus.If there just one person who think FN is valueble,we cannot say this is consesus,but if there is 10000,or 1 billion who make consesus,then you can say,FN should be in the market.Fn happens to have so many users make the consesus.The number of people in Filenet community has reached 210000+,the autonomy community is up to 21,the global super nodes is over 51+,Our community is still growing,our consensus is also deepening,because we all believe in the future of FN.In short term,in the mining mode, on the one hand: the tokens will be locked, and the decrease in circulation can increase the value of the token; on the other hand: mining can also generate income.
On the long term,Filenet can provide commercial applications with commercial value. Giant Internet companies such as Tencent WeSee and Byte Dance with giant data amount will have requirements for massive storage. Filenet can provide distributed storage services to solve the problem. Companies need to pay and lock FN for the distributed storage services. In this way, the circulation of FN on the market can be controlled, and thereby the value can be appreciated.
Molly: Q4.Can ordinary users also participate in mining? If can participate, how much mining can ordinary user do? And please explain the role of FN Coin easily.
Andrew:
Ordinary people can also participate in mining,as long as you pledge 400FN,and provide 4T storage space,you can join to mining.And the specific details depend on the mining pool you joined,you can see these pictures for a detailed mining tutorial.

https://preview.redd.it/z9hr1knkmay41.png?width=864&format=png&auto=webp&s=61abf14e3e659430f8387915389e024a1523ad2e

https://preview.redd.it/g8r2hmgmmay41.png?width=864&format=png&auto=webp&s=d82d323958a9ff11761b7c165be0179d7aeb91d9
Molly: Q5.What's the future plan of Filenet?
Andrew:
In the 1.0 stage, Filenet is the first distributed storage application public chain on the mainnet, the first distributed storage application public chain on the exchange, and the first distributed storage application public chain using the DPOS + POC consensus mechanism.
Filenet 2.0 comprehensively solves the key shortcomings of centralized data service centers.
In Filenet3.0 stage, the vision can catch up with and surpass many leading projects and brands of the decentralized distributed storage track, such as Filecoin, IBM, Amazon, Maidsafe, and become the leader of the track.

Free-asking Session

Q1.What is the difficulty bomb solution? Can you tell us more about [email protected]
Andrew:

https://preview.redd.it/zghna15smay41.png?width=905&format=png&auto=webp&s=2f01912ecb429f6e543d0b74322f4c295b901015
difficulty bomb is a solution to to encourage the nodes of the entire network to contribute more storage space and bandwidth, the Filenet Foundation plans to implement the difficulty bomb program in stages from May 1, 2020.
Q2.Checking the website, I found that the transaction fees of FN coins are very low, and the transaction speed is also very high! Can you explain how the FILENET project can achieve such a high transaction rate at the lowest [email protected]
Andrew:
As I said just now,there are lots of ways to generate revennue,in short term Filenet can provide commercial applications with commercial value. Giant Internet companies such as Tencent WeSee and Byte Dance with giant data amount will have requirements for massive storage. Filenet can provide distributed storage services to solve the problem. Companies need to pay and lock FN for the distributed storage services. In this way, the circulation of FN on the market can be controlled, and thereby the value can be appreciated.And in long term Filenet is aim to encourage the nodes of the entire network to contribute more storage space and bandwidth, the Filenet Foundation plans to implement the difficulty bomb program in stages from May 1, 2020.
Q3.According to packaging node program, theywill recruit 105 packaging nodes worldwide. If 105 packaging nodes have been allocated, can I still participate in the activities of this packaging [email protected]
Andrew:
yes,of course,our paging nodes have proceed to the fifth issue,you can join us.
Q4.Why do people have to buy FN or hold it back? What is the FILENET team's plan to keep competing in the [email protected]
Andrew:
You could also refer to the eco mode and the apppreciation logic I've jsut share.
Q5.what are the benefits of $FN Long Term [email protected]
Andrew:
As we just shared: For long term, Filenet can provide commercial applications with commercial value. Giant Internet companies such as Tencent WeSee and Byte Dance with giant data amount will have requirements for massive storage. Filenet can provide distributed storage services to solve the problem. Companies need to pay and lock FN for the distributed storage services. In this way, the circulation of FN on the market can be controlled, and thereby the value can be appreciated.
Follow us:
Telegram: https://t.me/MXCEnglish
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Twitter: https://twitter.com/MXC_Exchange
https://twitter.com/MXC_Fans
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Facebook: https://www.facebook.com/mxcexchangeofficial/
Discord: https://discord.gg/zu5drS8
submitted by SimonZhu666 to MXCexchange [link] [comments]

Bitcoin's fundamentals haven't changed since the price fell

Bitcoin's fundamentals haven't changed since the price fell
The financial crisis predicted by economists has finally begun. As we have seen, since March 9, 2020, the virus that has spread throughout the world has become a catalyst for a sharp decline in financial markets.

https://preview.redd.it/8dr6q251hfn41.png?width=450&format=png&auto=webp&s=7683d8c0bac183b81d5705f23c4b547ab5118e70
The growing economic crisis has triggered collective panic, and for 99% of people, it is imperative to restore as much liquidity as possible. Logically, we are facing a liquidity crisis that is having a significant impact on the liquidity of all financial markets around the world. On Wall Street, the Dow Jones Index has fallen by 20% in the past 5 days. Over the past month, the Dow Jones Index has fallen by about 30%, and the S & P 500 has undergone the same adjustment.

In the rest of the world, the situation is exactly the same. For centuries, gold has been used as a safe-haven asset in times of crisis, but in recent days it has fallen by more than 10%.

When everyone is in panic, there is no safe haven at all. In this case, it is impossible for Bitcoin to not fall. Bitcoin is a highly liquid market, and it can even be said that it is the only truly free market in the world.

Even though Bitcoin has evaporated $ 60 billion in market value in just a few hours, it continues to operate, allowing investors to find equilibrium prices on their own.

Whether an asset has hedging properties requires long-term measurement. Similarly, the correlation between Bitcoin and other assets cannot be concluded in these days. At this point, if we step back, we can see the big picture instead.

Although the price of Bitcoin has changed, has its fundamentals changed? No, the fundamentals of Bitcoin March 18 are the same as those of March 1. Bitcoin still maintains good fundamentals, which gives us reason to be optimistic about the future of Bitcoin.

01

Bitcoin is as scarce as ever

The price of Bitcoin dropped from $ 9,000 to more than $ 3,000 within a few days. Its price has now stabilized at around $ 5,300. The current global situation is in turmoil, and panic in the market may cause the price of the currency to fall below $ 5,000 again.

However, no matter what the price of Bitcoin is, it remains as scarce as ever.

Bitcoin is still the rarest decentralized invention ever made by human beings, and no matter what happens, the maximum supply of Bitcoin will not change. No leader in this world can change the fact that the total amount of Bitcoin is 21 million.

So after the crisis, gold and bitcoin will eventually resume their roles, and when prices will rise again, those who have seized the opportunity will get huge returns.

02

Unique monetary policy

Bitcoin was created by Satoshi Nakamoto in response to the 2008 financial crisis. Realizing that the currency and financial system have reached their limits, Satoshi Nakamoto decided to officially launch the Bitcoin experiment on January 3, 2009, and wrote in the genesis block: The Treasury Secretary is on the brink of saving the bank for the second time. "

Therefore, we can also think that Bitcoin was created for what we will experience in the coming weeks or months. When Satoshi Nakamoto created Bitcoin, he hoped to obtain a scarcity similar to gold, so the longer it took, the more difficult it was to create a new Bitcoin. For every 210,000 additional transaction blocks, the number of newly mined Bitcoins will be halved.

Initially, for every additional transaction block in the Bitcoin blockchain, 50 new bitcoins will be generated, and by May 2020, the bit will be halved for the third time, after which each additional block will only add 6.25 BTC. Therefore, the number of new bitcoins created daily in the future will be reduced from 1800 to 900, which will have a certain impact on the total supply of bitcoin.

This single monetary policy is a huge advantage of Bitcoin over the current monetary and financial system. After the third Bitcoin halving, the annual inflation rate of Bitcoin supply will definitely fall below 2% to 1.8%. In the future, bitcoin's annual supply inflation will tend to zero, and will reach zero in 2140, at which time all bitcoin will be mined.

Bitcoin's monetary policy can protect what you have, and it was still valid when the Fed just decided to inject more than $ 700 billion in US banks. It can be said that from the perspective of how Bitcoin operates, the Fed still has a lot to learn.

03

Bitcoin network is still decentralized

Anyone can join the Bitcoin blockchain and become a node in the network. In the Bitcoin world, all users are equally important. All this makes Bitcoin able to withstand the obstacles of powerful people in the current system.

No one can stop you from using Bitcoin at will. At any time, if you want, you can sell all your Bitcoins. This is why the price of bitcoin has fallen sharply in the past few days. Bitcoin operates permanently by letting users determine its equilibrium price.

Once the stock price falls too fast, Wall Street will cease to trade. At this point, Bitcoin once again shows its superiority over Wall Street. The basic fact that Bitcoin is the only truly free market in the world has been proven again a few days ago.

04

Bitcoin remains a secure decentralized network

In its 11 years, the Bitcoin network has never been hacked. Bitcoin's security has never been breached and it's incredible to think about it, because hackers from all over the world have been trying to attack Bitcoin over and over again.

Still, Bitcoin has stood on its feet. The theft in the Bitcoin world exists only at the weakest link: trading platforms and users. Since its birth, Bitcoin has been operating normally 99.98% of the time. There is nothing enviable about the normal operation of Internet giants such as Google, Amazon, or Facebook.

However, Bitcoin's secure operation is based only on the user's computing power. These people are so convinced about the future of Bitcoin that they have been providing more computing power to the network.

At the beginning of 2020, the hashrate of the Bitcoin network reached a peak of 130TH / s. The recent drop in the price of Bitcoin and the accompanying collective panic have led to a decline in computing power, but currently still maintain the level of 100 TH / s.

In this crisis, Bitcoin remains the most secure decentralized network in the world. Secondly, you should notice that the basic situation of Bitcoin has improved a lot since the end of 2017. Due to the sharp increase in transaction volume at the end of 2017, the overall network speed has slowed down, but this time, Bitcoin standing in the storm has been able to absorb an entire transaction volume peak without any stalls.

05

Bitcoin still belongs to everyone

The high fluctuations in the price of bitcoin in the past week remind us that bitcoin still belongs to everyone and everyone can sell bitcoin freely. When Bitcoin depreciated by 50% within hours, the transaction continued.

At the same time, once the market falls more than 7%, Wall Street will suspend trading for 15 minutes. This fusing mechanism has been applied several times since the liquidity crisis broke out in the market.

Wall Street is not a free market. It belongs to a few powerful people who protect their interests at all costs. Once the market does not turn around and continues to fall, Wall Street will call on the Federal Reserve to maintain the current system.

The Federal Reserve ’s monetary stimulus measures have become less and less effective. It cut interest rates by 100 basis points on March 15, 2020. At the same time, it introduced a quantitative easing plan to reduce the bank deposit reserve ratio to zero. This series of measures was even affected Opposition to Wall Street. Once again, Bitcoin stands out in the current system with its strong fundamentals.
submitted by FinnHe to Bitcoin [link] [comments]

How much would a Bitcoin node handling 1GB blocks cost today? I did some back-on-the-envelope calculations.

1GB blocks would be able to confirm more than 5000tx/s. That would be VISA-level scale (which handles, on average, 1736tx/s). We often hear that we shouldn't raise the blocksize because then nodes would become too expensive to run. But how expensive exactly?
We have the following costs to take into account:
For now, I'm going to assume a non-pruned full node (i.e. a node that stores all transactions of the blockchain) for personal use, i.e. for a computer built at home. I'll add in the calculations for a pruned node at the end, which would likely be the prefered option for people who merely want to verify the blockchain for themselves. If you don't care about the assumptions and calculations, you can just jump right to the end of this post. If you spotted any error, please inform me and I'll update my calculation.

Storage

There's, on average, one block every 10 minutes, that is 144 every day and 4320 blocks every thirty days. I was able to find a 3TB HDD for $47,50 on Amazon, that is $0.018/GB. Storing all blocks with all transactions of a month (4320GB) would be $78.96/mo. Prices for storage halved from 2014 to 2017, so we can assume that to half in 2022, thus we can reasonably assume it'd cost around $40/mo. in 2022.
But would such an inexpensive hard disk be able to keep up with writing all the data? I found a comparable cheap HDD which can write 127MB/s sequentially (which would be the writing mode of Bitcoin). That would be enough even for 76GB blocks!
Edit: For the UTXO set, we need very fast storage for both reading and writing. Peter__R, in his comment below, estimates this to be 1TB for 4 billion users (which would make ~46,000tx/s if everyone would make 1tx/day, so id'd require about 10GB blocks). jtoomim seems more pessimistic on that front, he says that much of that has to be in RAM. I'll add the $315 I've calculated below to account for that (which would be rather optimistic, keep in mind).

Bandwidth

Bandwidth is more complicated, because that can't just be shipped around like HDDs. I'll just take prices for my country, Germany, using the provider T-online, because I don't know how it works in the US. You can plug in your own numbers based on the calculations below.
1GB blocks/10 minute mean 1.7MB/s. However, this is an average, and we need some wiggle room for transaction spikes, for example at Christmas or Black Friday. VISA handles 150 million transactions per day, that is 1736tx/s, but can handle up to 24,000tx/s (source). So we should be able to handle 13.8x the average throughput, which would be 1.7MB/s x 13.8 = 23.46M/s, or 187.68Mbit/s. The plan on T-online for 250Mbit/s (translated) would be 54.95€/mo (plus setup minus a discount for the first 6 months which seems to cancel out so we'll ignore it), which would be $61.78/mo. This plan is an actual flatrate, so we don't have to worry about hitting any download limit.
Note, however, that we don't order bandwidth for only our Bitcoin node, but also for personal use. If we only needed 2MB/s for personal use, the plan would be 34.95€, thus our node would actually only cost the difference of 20€ per month, or $22.50/mo. Nielsen's Law of Internet Bandwidth claims that a high-end user's connection speed grows by 50% per year. If we assume this is true for pricing too, the bandwidth cost for ~200Mbit/s/mo. would go down to 12.5% (forgot how exponential growth works) 29.6% of its today's cost by 2022, which decreases our number to $2.81/mo. $6.66/mo.
Edit: jtoomim, markblundeberg and CaptainPatent point out that the node would have a much higher bandwidth for announcing transactions and uploading historical blocks. In theory, it would not be necessary to do any of those things and still be able to verify one's own transactions, by never broadcasting any transactions. That would be quite leechy behaviour, though. If we were to pick a higher data plan to get 1000MBit/s downstream and 500MBit/s upstream, it would cost 119.95€/mo., however this plan isn't widely available yet (both links in German). 500MBit/s of upstream would give us max. 21 connected nodes at transaction spikes, or max. 294 connected nodes at average load. That would cost $39.85 in 2022 (with correct exponential growth).

CPU/Memory

CPU/Memory will be bought once and can then run for tens of years, so we'll count these as setup costs. The specs needed, of course, depend on the optimization of the node software, but we'll assume the current bottlenecks will have been removed once running a node actually becomes demanding hardware-wise.
This paper establishes that a 2.4GHz Intel Westmere (Xeon E5620) CPU can verify 71000 signatures per second... which can be bought for $32.88 a pair on Ebay (note: this CPU is from Q1'10). We'd need to verify 76659tx/s at spikes (taking the 13.8x number), so that pair of CPUs (handle 142,000tx/s) seem to just fit right in (given one signature per tx). We'd also have to account for multiple signatures per transaction and all the other parts of verification of transactions, but it seems like the CPU costs are neglegible anyway if we don't buy the freshest hardware available. ~$100 at current prices seem reasonable. Given Moore's Law, we can assume that prices for CPUs half every two years (transistor count x1.4162), so in three years, the CPU(s) should cost around $35.22 ($100/1.4163).
For memory, we again have to take into account the transaction spikes. If we're very unlucky, and transactions spike and there won't be a block for ~1h, the mempool can become very large. If we take the factor of 13.8x from above, and 1h of unconfirmed transactions (20,000,000tx usually, 276,000,000tx on spikes), we'd need 82.8GB (for 300B per transaction).
I found 32GB of RAM (with ECC) for $106, so three of those give us 96GB of RAM for $318 and plenty remaining space for building hash trees, connection management and the operating system. Buying used hardware doesn't seem to decrease the cost significantly (we actually do need a lot of RAM, compared to CPU power).
Price of RAM seems to decrease by a factor of x100 every 10 years (x1.58510), so we can expect 96GB to cost around $79.89 ($318/1.5853) in 2022.
Of course, CPU and memory need to be compatible, which I haven't taken into account. Chug a mainboard (~$150) and a power supply (~$50) into the mix, and the total would be just over $600 for today's prices. Even if mainboard and power supply prices remain the same, we'd still only have to pay around $315 for the whole setup in 2022.

Electricity

I found the following power consumptions:
So we'd have 129W 147.6W + N*6W. Electricity cost average at 12ct/kWh in the US, in Germany this is higher at 30.22ct/kWh. In the US, it would cost $11.14 $12.75 + N*$0.52 (P*12ct/kWh / 1000 * 24h/day *30days / 100ct/$), in Germany 28.06€ 32.11€ + N*1.30€.
At the end of the first year, it would cost $20.12 $21.73/mo. in the US and 50.52€ 54.57€/mo. in Germany.
At the end of the second year, it would cost $29.11 $30.72/mo. for the US and 72.98€ 77.03€/mo. for Germany. It increases by $8.98/mo. per year in the US and by 22.46€/mo. per year in Germany.
Electricity prices in Germany have increased over time due to increased taxation; in the US the price increase has been below inflation rate the last two decades. As it's difficult to predict price changes here, I'm going to assume prices will remain the same.

Conclusion

In summary, we get:
If we add everything up, for today's prices, we get (E: updated all following numbers, but only changed slightly) $132/mo. (US), $187/mo. (DE) for the second year and $71.92/mo. $78/mo. (US), $115.79/mo. $124/mo. (DE) in 2022.
It definitely is quite a bit of money, but consider what that machine would actually do; it would basically do the equivalent of VISA's payment verification multiple times over, which is an amazing feat. Also, piano lessons cost around $50-$100 each, so if we consider a Bitcoin hobbyist, he would still pay much less for his hobby than a piano player, who'd pay about $400 per month. So it's entirely reasonable to assume that even if we had 1GB blocks, there would still be lots of people running full-nodes just so.
How about pruned nodes? Here, we only have to store the Unspent Transaction Output Set (UTXO set), which currently clocks in at 2.8GB. If blocks get 1000 times bigger, we can assume the UTXO set to become 2.8TB. I'll assume ordinary HDD's aren't goint to cut it for reading/writing the UTXO set at that scale, so we'll take some NVMe SSDs for that, currently priced at $105/TB. Three of them would increase our setup by $315 to $915, but decrease our monthly costs. E: However this UTXO set is also required for the non-pruned node, therefore the setup costs stay at $915. Even in the highest power state, the 3 SSDs will need only 18.6W in total, so we'll get a constant 147.6W for the whole system.
In total, this is:
In total, this is $35.25/mo. in the US and $58.57/mo. in Germany for today's prices, or (E:) $19.41/mo. (US) and (E:) $42.73/mo. (DE) in 2022's prices. Which looks very affordable even for a non-hobbyist.
E: spelling
E²: I've added the 3 NVEe SSDs for the UTXO set, as pointed out by others and fixed an error with exponentials, as I figured out.
submitted by eyeofpython to btc [link] [comments]

How I Got Paid By 65 Different Beermoney Programs in 2018 [Guide]

How I Got Paid By 65 Different Beermoney Programs in 2018

Hi! Welcome to my guide for everything that paid me in 2018. Before I begin, here are a few details:
Now, let’s get into the good stuff.

1. Quickthoughts - $590

This was my top earner for the year and it only took me up until September to earn this amount. I had to stop because they require a W9 for anything over $600 and I was too lazy to file that. It is pretty similar to a traditional survey router, but I seem to have much better luck with not disqualifying here. I get paid $1 per survey but some people earn $2 per survey based on their demographics. Some people have issues with bans and getting locked out of accounts, so it is not for everyone. Because of this, it is important to cash out the minute you hit the cashout minimum of $10. There are both android and iOS apps but I highly recommend using android if possible because the iOS app pays in iTunes gift cards and the android app pays in Amazon gift cards. Overall, Quickthoughts is great if you are one of the lucky ones without account issues.

2. CrowdTap - $270

This is one of my favorite beermoney programs of all time. You complete a variety of very short polls and questions about consumer goods, food products, and services. The polls pay 1.5 cents each and the short answer questions pay 10 cents each. There are other ways that they ask questions, including longer surveys that are a combination between the polls and questions. All of them are well worth it for the time that they take. Reward options include Amazon, Target, Walmart, Steam, Xbox, and more. You can cash out starting at $5 and I am able to cash out about once a week. Definitely add this one to your routine if you have not yet.

3. Prolific Academic - $197.95

This one is great. Take academic surveys for universities and researchers and get paid in cash. As long as you don’t miss attention checks you won’t get disqualified. Some people get multiple surveys a day and others get only a few a week based on demographics. Many pay at least minimum wage. I could have made a lot more on here if I tried. Universally regarded as one of the most “worth it” survey sites so give it a shot!

4. Pinecone Research - $138 + Ranch Dip and Dog Chews

Pinecone pays a guaranteed $3 for 10-15 min surveys regarding opinions on new products. They also send free samples sometimes! You can cash out for a variety of gift cards or PayPal. I get about 1 survey a week on average. Pinecone is invite only so look for invites to sign up on other GPT sites as sometimes you can find them there. If you get in it is some of the best money you can make with surveys for the time you spend on it.

5. Branded Surveys - $130

Branded Surveys has traditional router surveys. A major perk of using Branded used to be their generous daily login bonus. This has been reduced to 5 cents a day, so it might not be worth using this site for the login bonus alone anymore. They have a very high EngageMe rate at one cent per 3 videos if that’s your thing as well! Payouts start at $10 via Paypal and Amazon.

6. Nicequest - $120

Big fan of this one. Their surveys have guaranteed rewards even if you screen out and can pay up to $2-3 for like 10-15 minutes. Their currency is “shells” and each shell converts to about 7 cents. Installing their meter on your devices adds a guaranteed 5 shells per survey. If you add it to your computer, phone, and tablet you get an extra 15 shells (about a dollar) per survey. I just have it on my computer so I get 5 bonus shells. Cashouts are quick for e-gift cards and they also offer physical items. Saving up for larger gift cards typically gives you better rates.

7. PrizeRebel - $107

PrizeRebel is your typical GPT site with a variety of ways to earn, but it is most well-known for surveys. They pay $0.80 per survey on the YourSurvey router and that is where a majority of my earnings have come. Lots of cashout options starting at $2.

8. YouGov - $100

YouGov is a survey site/app that pays anywhere from $0.50 to $2 per survey. The best part of it is that you never disqualify. I get a couple surveys a week. Most of the surveys are about public policy, politics, or general opinions of companies. You get the best value for your points if you save up for the $100 cash out. They offer the $100 cash out in bank transfer and Amazon. The Amazon gift card option used to be a physical mailed card but now its an e-gift card so that makes it even better! They offer other gift cards but they are for smaller values at worse rates so I would avoid them. Available online, on android, and on iOS.

9. iMoney - $89

Get paid to download apps! The best thing about iMoney is that the apps always credit and you can get credit for apps you have downloaded before. That’s not the case on most paid-to-download apps. Earn 15-30 cents per app and there are 3-4 new apps available each day. They offer Amazon and PayPal but PayPal has a small fee. Added this towards the end of the year and hope to make more next year. Might not be in the app store at the moment? Couldn’t find a link to put in the title.

10. VeryDice - $65

Roll dice, get points, redeem for physical items and e-gift cards. I get the daily spin rolls every day and watch their ads for more rolls. The key to VeryDice is saving up approximately 100 rolls before rolling to have enough to get the daily doubles bonus of $0.30. Worth keeping on your phone even if it’s just for the daily spin rolls. Available on both iOS and Andoid. If you want to enter my ref code at sign up you’ll get 30 free rolls :). It is 1319422.

11. Forthright - $62

Sign up and receive invitations to surveys via email. Don’t do their “partner surveys”, they rarely credit and you can get stuck in an endless loop. Their non-partner surveys are awesome. They pay well for the time spent but they also have one of the best disqualification bonusses I have ever seen. Every three surveys you take, regardless of whether you disqualify or not, you get a $2 bonus. That is $0.66 per survey on top of its base pay regardless of whether you qualify or not. They pay instantly with PayPal, Amazon, or Bitcoin.

12. VolKno - $55

Do you like movies? Then this one’s for you. Watch, rate, and tag movie trailers to earn Amazon gift cards. Each trailer has three stages and after completing all three you will make 23.5 cents per trailer. One thing to keep in mind is that you need a physical verification card sent to a US address in order to activate your account. I completed basically every trailer that was posted over the year, so my earnings are a good estimate of what you can plan on earning.

13. Inbox Dollars - $52.03

A pretty shit GPT site with a high minimum cash out. Not sure how I ever hit the minimum cash out here. Would not recommend.

14. Zap Surveys (Ref for $0.75 bonus) - $52.03

There are three main ways to earn here: a 3 cent daily login bonus, 7 cent location rewards for opening the app when a notification appears, and surveys. If you’re going to do surveys on here do relatively short TapResearch ones. The location rewards alone are why I use this app. The one negative of this app is that the cash out minimum is $25. Definitely worth having on your phone!

15. PointClub - $50

This is a pretty normal survey site. They have a daily login streak bonus that can double the value of your surveys when you reach the max streak which can make a lot of them worth your time. I stopped receiving surveys, so I assume I’m banned? So be careful with this one. Cash out minimums are $25 which is higher than I would like.

16. Survey Monkey Rewards - $49.15

Another one of my favorites. Survey Monkey Rewards is a survey app created by Survey Monkey, a big name in survey development software. Surveys all take under 3-4 minutes and pay either 25 or 35 cents based on length. I almost never disqualify, and you can cash out instantly to Amazon starting at $5. Available on Android and iOS.

17. Earn.com - $71.31

Earn.com lets people pay Bitcoin to contact you. I mostly received BTC to sign up for ICOs and airdrops for random tokens. They were aquired by Coinbase so there are changes to the program. They require a LinkedIn to make an account now as well (I think). If you can get into the program still it is pretty great!

18. MyPoints - $45

This is a sister-site to Swagbucks. I have decent success with their surveys so I use it for that. They have some other ways to earn but I don’t use them. If you have the same success with their surveys it might be worth using.

19. MicroWorkers - $44.16

Basically a smaller and sketchier MTurk. Lots of short tasks with decent earning potential but you have to find the right type of tasks for you. I did the click, search tasks for a while. There is PayPal with a $9 minimum but if I remember right they mail you a physical card with a pin before you can cash out to verify your identity. Not for everyone but worth a look.

20. SurveysOnTheGo - $43.30

This one is pretty simple. Get surveys on your phone, and redeem for Amazon, Visa, PayPal, and Starbucks! Surveys range from $0.50-$10. Some are location based and involve in-store activities. The more involved the surveys are, the more they pay. Don’t expect a ton of surveys, but many of them are worth your time. Available on Android and iOS. Minimum cash out is $10.

21. Survey Junkie - $40

This survey site is average at best. I am having less success with them recently because I can’t be bothered to take a 20 minute survey for $0.90. The one benefit of this site is that they have a VERY small disqualification bonus. Some people do have success taking surveys on here and the cash out minimum is $10.

22. E-Poll - $35

Another survey provider with no disqualifications! Woohoo! You receive email notifications when you have a new survey. Surveys pay $0.50-$2 and are usually not too long. They pay via a points system and you get better rates if you save up for the higher rewards. I cash out for Amazon, and they can take a long time to deliver rewards so be patient.

23. MooCash - $33.60

MooCash pays you to download apps and then open them for 3 days once a day. I have gotten paid as much as $2 for a single app download. They don’t always credit super easily so I would only try the better paying ones. You can cash out for BTC, Amazon, PayPal, and more. You can use my ref code (EHNPNC) when you sign up for some free coins. I think it’s only available to the first 20 people.

24. InstaGC - $33

This is a pretty basic and easy to use GPT site. Very low cashout minimums with lots of options. Check out LiveSample and YourSurveys for a good place to start on surveys.

25. PaidViewpoint (Ref) - $32.65

Short surveys with minimum PayPal cashout of $15. There are short surveys to collect demographic information that pay 10 cents. If you qualify for any of the longer surveys they can pay as much as $1.50. Surveys can be sporadic so just check the site once a day. Worth the time it takes to put into it.

26. UserCrowd (UsabilityHub) - $32.40

UsabilityHub, now rebranded to UserCrowd, pays you to give feedback on websites and products. Each task pays anywhere from 10-50 cents and the minimum cash out is $10. UserCrowd is nice because unlike other usability testing sites you don’t need to record your voice or screen. I leave it in a pinned tab on Chrome and get notifications when there is a new task. They can vary in how often you get them. I enjoy this one, give it a shot.

27. OnePulse - $30

This app has very short surveys with guaranteed rewards. You never disqualify or anything like that. I get a notification that I have a new paid survey about once a week. Surveys pay 30 cents to start but as you “level up” they become worth slightly more. Right now mine are worth 34 cents. Cashout is at $5 via PayPal. Available on iOS and Android.

28. Watchback - $30

This is the best sweepstakes app I have used. You get entries into the sweepstakes by watching videos. Each video is an entry. I watch 10 videos a day and usually win either $0.50 or $1 each day. It pays via Perk points so it’s a nice supplement to your Perk routine. If this keeps being so easy to win I should make a lot more with it next year! Available on Android and iOS.

29. Dabbl - $30

I started using Dabbl towards the very end of the year. They offer short brand-sponsored polls and videos that pay anywhere from 5-20 cents. These are super infrequent and cashing out from these alone would take the better part of a year. Where I earn with Dabbl is their non-passive ads. You get paid 1 cent per ad so I run them when I’m doing other things. It adds up. They don’t offer Amazon so I cash out for Target. Cash outs are at $5. iOS and Android.

30. Gravy - $25

This is a pretty fun game show app. To summarize the game, you pick a percentage that you think a product will sell out at, and if you’re within the closest few people to the right percentage you win a decent little chunk of cash. I’ve won once. You can buy discounted products on here as well. Go check it out, it’s pretty addicting. My ref code is “Leeves” if you want to throw some bonus guesses my way :).

31. KinIt - $25

Take short polls and quizzes and get paid 6-25 cents a day. The unfortunate thing about KinIt is that they very rarely have their gift cards in stock. When they have them in stock they have a decent selection. Still worth your time in my opinion. iOS and Android are supported.

32. Life Fun and Everything - $25

This was an invite-only survey panel that gives me a $2 survey once a month. Found it on some GPT site.

33. Panel - $25

Install Panel on your phone and get paid for sharing your location data. They drastically reduced their pay rate recently so I’m not sure it’s worth it anymore. Previously you could expect to make about $25 a year.

34. Perksy (Ref) - $25

Short polls that pay anywhere from $0.50 to $1. I get about one a week. Only downside is that the minimum cash out is $25. Various gift cards (including Amazon) are available. Definitely worth keeping on your phone. I think it’s iOS only at this time.

35. Swagbucks - $25

One of the easiest GPT sites to use. Lots of offer walls and surveys. I don’t make a lot here but basically just do daily search, daily poll, Swago, and SwagIQ. If I wasn’t banned from their surveys for some reason I might make a little more. I use swagbucks from time to time to find easy offers to do. Overall, a decent place to start of you’re experimenting with beermoney for the first time.

36. Survey Mini- $25

This app uses your location data and pays you 10 cents (sometimes more) to fill out a short poll about stores and restaurants that you go to. They recently added e-gift cards instead of physical cards so that makes it a lot more attractive to use! iOS and Android.

37. IBotta - $20

This is one of the better apps that give you rebates on select grocery items as you shop in-store. If you buy a lot of groceries, there is money to be made here. They also have traditional online cashback portals and offers.

38. Streetbees - $19

This app has surveys with a more personal and fun spin. You get paid via PayPal for each task that you finish. There aren’t always tasks available but when there are, they often pay well. I had one for testing an app that paid $9! It’s a nice option for something a little different than traditional surveys.

39. AttaPoll - $15.29

Attapoll is a survey app that sends you more traditional router surveys (many of which are Cint surveys). You might disqualify quite a bit here depending on your demographic so I stick to the short ones. Payouts are via PayPal, Bitcoin, and Ethereum. PayPal starts at $3 (nice), ETH at $3.50, and BTC at an insane $100. On both Android and iOS.

40. Smores - $15

Smores is an Android lock screen app that pays a flat $0.10 a day for unlocking your device once. Their non-passive video section pays a cent per 2 videos at the moment so that can be a decent earner as well. Cash out as low as $1 for Amazon and other gift cards. I was pretty inconsistent in my daily unlocks this year and hope to increase my earnings next year.

41. Crowdology - $10.04

Very straight forward. Do surveys, get paid. Some people have success with this type of site, and others disqualify a lot. I would stick to any surveys under 10 minutes in length to avoid wasting your time. Cash out for Amazon or PayPal at $10.

42. Achievement - $10

This app pays you based on your steps. I have it connected to Apple Health. It took me about 9 months to earn $10 and I am pretty active. Android and iOS are both supported. Doesn’t run in the background or drain my battery from what I can tell so it’s very passive and harmless.

43. Gamermine (Ref code for $1 bonus) - $10

This is a GPT site with a few offer walls. They have good EngageMe rates as well as a 5 cent daily bonus as long as you’re making a dollar a week on offers on the site. This is basically the only truly passive income that I have made this year from running EngageMe.

44. Cross Media Panel - $10

This is a program through Google that paid you to let them have an extension on your browser and on your phone. They discontinued most of this program so I am no longer earning from them. Parts of this program still exist but I haven’t looked into it much. Probably just worth skipping over at this point.

45. Lifetap - $10

This app is just a garbage survey router now. It used to have some other short guaranteed-pay surveys. I wouldn’t mess with this anymore.

46. PayTime - $9.99

Paytime lets you earn money for your subscriptions by watching ads and answering a few questions about them. You can only cash out once a month because it is supposed to be used for monthly subscriptions. All they do is send you $9.99 via PayPal or Venmo once you watch 40 ads. The catch with PayTime is that you need to be a student at one of the universities that they support. Check their website for the list. Overall, if you are a student it could be an easy $10 a month. Hope to use this more next year.

47. Ready Games - $9.19

Get paid to play games! There is a new game every 48 hours and the top 20% of scores at the end of the time period get paid. The top player makes $7 and the payout decreases as you go down the ranks. I have won somewhere around $2.50 every game that I have made it into the top 20%. Pays via PayPal when you win. On Android and iOS. You can use share code “lucky-disk-68” if you want to give me some extra lives :).

48. Carepoynt - $7

This is a pretty bad healthy living/rewards site. I think they had a few easy ways to earn, like downloading their app, and that’s how I cashed out. There was a post about it so be looking for opportunities like these on the subreddit. I won’t be using this again.

49. Amazon Shipping History Task - $6

Look for tasks like this that get posted on the subreddit. Got paid to submit some shipping data from Amazon.

50. DailyWin - $6

This used to be a scratch card app with a non-passive video section but it seems to be dead. Move along, nothing to see here.

51. CitizenMe - $5.97

Take short polls. Get instantly paid small amounts of money via Paypal. Pays in GBP so if your currency is USD you get to take advantage of that increase in value. Polls are spotty but worth it due to the instant payout (so no minimum or anything like that). iOS and Android.

52. PollPass - $5.15

Answer polls and get paid! Pays via PayPal at $5. Very simple and fun to use. Just answer the polls whenever they are available and watch the points add up. Added this at the end of the year so hope to expand on this next year.

53. Brand Insights Polling - $5

I honestly have no clue how I got paid by them. I think I took a survey that I found from a Facebook ad or something?

54. CashForApps - $5

Get paid to download apps! They don’t pay the best and sometimes have a hard time crediting but still might be worth a shot. The very best paying apps pay around 30 cents. Some pay pennies. Available on iOS and Android. You can use my invite code “4848a6” and get a few free points.

55. EarnWallet - $5

This was a from a promotion that was posted on beermoney for just downloading EarnWallet. Check out the sub for opportunities for occasional promotional opportunities like this.

56. Shopkick - $5

Scan items, check into stores, and earn cash back for buying certain items. Not a huge earner but can be fun to mess around with when you’re out shopping. Available on iOS and Android.

57. Louder Rewards - $5

This app paid $5 Amazon to download 5 apps and use them for 3 minutes. It was a one time offer so I don’t use it anymore. It’s on iOS and Android.

58. Qmee - $4.68

Install their extension and get paid a few cents for random searches that you make. They also have surveys. I use PayPal to cash out and there aren’t any minimums that that’s cool!

59. Google Opinion Rewards - $4.68

This app sends you occasional very short surveys from Google that pay 10-20 cents. Using Google services and being mobile seems to increase the number of surveys that you get. Some people get a lot, some get less. Worth just having on your phone. The iOS app pays via PayPal and the Android app just give you Google Play credits.

60. College Pulse - $5

This app has polls for college students to take. I think you need a .edu email address? Their rewards kinda suck so I stopped using it but they had an offer to cashout for $5 bitcoin to the Ben bitcoin wallet so I did that. Maybe worth it depending on what reward options they have at the time. Android and iOS.

61. Fetch Ref Code For $2-$5 Bonus: XE2XG - $3

Scan receipts and get paid. I get 2.5 cents per receipt on average. They also have products that you can get rebates on when you buy (sorta like iBotta). They only accept grocery store receipts. A good addition to your receipt scanning routine.

62. Quick Survey - $1.61

See my section on iMoney. Very similar but with less apps available and larger fees.

63. CoinOut - $1.02

This is one of the most straight forward receipt scanning apps. It pays 1-5 cents a receipt (typically 2 cents). Cash out starts at $1 for Amazon or PayPal which is way lower than most receipt apps. Very nice. Hope to earn more with this next year. Has both Android and iOS apps.

64. Indeed Job Spotter - $1

This app pays you $0.50 per sign to submit help wanted signs that you find around your city. I have never actually submitted a sign but got paid $0.10 per sign to verify the validity of other people’s signs. I’ve seen people make pretty decent money on here.

65. 1Q - $0.25

This one seemed cool at first. Take short polls, get paid $0.25 instantly via PayPal. The problem is that I never get polls anymore. Others have had the same experience. You might be able to squeak a few cents out of it. Android and iOS.

TOTAL: $3014.92

Hope this helps you guys out, and if you have any questions let me know! Let me know what I should add to my routine :). Thanks to everyone who contributes to this subreddit because I found many of these programs thanks to you! Have a great 2019!
submitted by Goldeneye0242 to beermoney [link] [comments]

/r/Bitcoin FAQ - Newcomers please read

Welcome to the /Bitcoin Sticky FAQ

You've probably been hearing a lot about Bitcoin recently and are wondering what's the big deal? Most of your questions should be answered by the resources below but if you have additional questions feel free to ask them in the comments.
The following videos are a good starting point for understanding how bitcoin works and a little about its long term potential:
For some more great introductory videos check out Andreas Antonopoulos's YouTube playlists, he is probably the best bitcoin educator out there today. Also have to give mention to James D'Angelo's Bitcoin 101 Blackboard series. Lots of additional video resources can be found at the videos wiki page or /BitcoinTV.
Key properties of bitcoin
Some excellent writing on Bitcoin's value proposition and future can be found here. Bitcoin statistics can be found here, here and here. Developer resources can be found here and here. Peer-reviewed research papers can be found here. The number of times Bitcoin was declared dead by the media can be found here. Scaling resources here, and of course the whitepaper that started it all.

Where can I buy bitcoins?

BuyBitcoinWorldwide.com and Howtobuybitcoin.io are helpful sites for beginners. You can buy or sell any amount of bitcoin and there are several easy methods to purchase bitcoin with cash, credit card or bank transfer. Some of the more popular resources are below, also, check out the bitcoinity exchange resources for a larger list of options for purchases.
Bank Transfer Credit / Debit card Cash
Coinbase Coinbase LocalBitcoins
Gemini Bitstamp LibertyX
GDAX Bitit Mycelium LocalTrader
Bitstamp Cex.io BitQuick
Kraken CoinMama WallofCoins
Xapo BitcoinOTC
Cex.io
itBit
Bitit
Bitsquare
Here is a listing of local ATMs. If you would like your paycheck automatically converted to bitcoin use Cashila or Bitwage.
Note: Bitcoins are valued at whatever market price people are willing to pay for them in balancing act of supply vs demand. Unlike traditional markets, bitcoin markets operate 24 hours per day, 365 days per year. Preev is a useful site that that shows how much various denominations of bitcoin are worth in different currencies. Alternatively you can just Google "1 bitcoin in (your local currency)".

Securing your bitcoins

With bitcoin you can "Be your own bank" and personally secure your bitcoins OR you can use third party companies aka "Bitcoin banks" which will hold the bitcoins for you.
Android iOs Desktop
Mycelium BreadWallet Electrum
CoPay AirBitz Armory
Another interesting use case for physical storage/transfer is the Opendime. Opendime is a small USB stick that allows you to spend Bitcoin by physically passing it along so it's anonymous and tangible like cash.
Note: For increased security, use Two Factor Authentication (2FA) everywhere it is offered, including email!
2FA requires a second confirmation code to access your account, usually from a text message or app, making it much harder for thieves to gain access. Google Authenticator and Authy are the two most popular 2FA services, download links are below. Make sure you create backups of your 2FA codes.
Google Auth Authy
Android Android
iOS iOS

Where can I spend bitcoins?

A more comprehensive list can be found at the Trade FAQ but some more commons ones are below.
Store Product
Gyft Gift cards for hundreds of retailers including Amazon, Target, Walmart, Starbucks, Whole Foods, CVS, Lowes, Home Depot, iTunes, Best Buy, Sears, Kohls, eBay, GameStop, etc.
Steam, HumbleBundle, Games Planet, itch.io, g2g and kinguin For when you need to get your game on
Microsoft Xbox games, phone apps and software
Spendabit, The Bitcoin Shop, Overstock, DuoSearch, The Bitcoin Directory and BazaarBay Retail shopping with millions of results
ShakePay Generate one time use Visa cards in seconds
NewEgg and Dell For all your electronics needs
Cashila, Bitwa.la, Coinbills, Piixpay, Bitbill.eu, Bylls, Coins.ph, Bitrefill, Pey.de, LivingRoomofSatoshi, Hyphen.to, Coinsfer, GetPaidinBitcoin, Coins.co.th, More #1, #2 Bill payment
Foodler, Menufy, Takeaway, Thuisbezorgd NL, Pizza For Coins Takeout delivered to your door!
Expedia, Cheapair, Lot, Destinia, BTCTrip, Abitsky, SkyTours, Fluege the Travel category on Gyft and 9flats For when you need to get away
BoltVM, BitHost VPS service
Cryptostorm, Mullvad, and PIA VPN services
Namecheap, Porkbun For new domain name registration
Stampnik and GetUSPS Discounted USPS Priority, Express, First-Class mail postage
Reddit Gold Premium membership which can be gifted to others
Coinmap, 99Bitcoins and AirBitz are helpful to find local businesses accepting bitcoins. A good resource for UK residents is at wheretospendbitcoins.co.uk.
There are also lots of charities which accept bitcoin donations, such as Wikipedia, Red Cross, Amnesty International, United Way, ACLU and the EFF. You can find a longer list here.

Merchant Resources

There are several benefits to accepting bitcoin as a payment option if you are a merchant;
If you are interested in accepting bitcoin as a payment method, there are several options available;

Can I mine bitcoin?

Mining bitcoins can be a fun learning experience, but be aware that you will most likely operate at a loss. Newcomers are often advised to stay away from mining unless they are only interested in it as a hobby similar to folding at home. If you want to learn more about mining you can read more here. Still have mining questions? The crew at /BitcoinMining would be happy to help you out.
If you want to contribute to the bitcoin network by hosting the blockchain and propagating transactions you can run a full node using this setup guide. Bitseed is an easy option for getting set up. You can view the global node distribution here.

Earning bitcoins

Just like any other form of money, you can also earn bitcoins by being paid to do a job.
Site Description
WorkingForBitcoins, Bitwage, XBTfreelancer, Cryptogrind, Bitlancerr, Coinality, Bitgigs, /Jobs4Bitcoins, Rein Project Freelancing
OpenBazaar, Purse.io, Bitify, /Bitmarket, 21 Market Marketplaces
Watchmybit, Streamium.io, OTika.tv, XOtika.tv NSFW, /GirlsGoneBitcoin NSFW Video Streaming
Bitasker, BitforTip, WillPayCoin Tasks
Supload.com, SatoshiBox, JoyStream, File Army File/Image Sharing
CoinAd, A-ads, Coinzilla.io Advertising
You can also earn bitcoins by participating as a market maker on JoinMarket by allowing users to perform CoinJoin transactions with your bitcoins for a small fee (requires you to already have some bitcoins)

Bitcoin Projects

The following is a short list of ongoing projects that might be worth taking a look at if you are interested in current development in the bitcoin space.
Project Description
Lightning Network, Amiko Pay, and Strawpay Payment channels for network scaling
Blockstream and Drivechain Sidechains
21, Inc. Open source library for the machine payable web
ShapeShift.io Trade between bitcoins and altcoins easily
Open Transactions, Counterparty, Omni, Open Assets, Symbiont and Chain Financial asset platforms
Hivemind and Augur Prediction markets
Mirror Smart contracts
Mediachain Decentralized media library
Tierion and Factom Records & Titles on the blockchain
BitMarkets, DropZone, Beaver and Open Bazaar Decentralized markets
Samourai and Dark Wallet - abandoned Privacy-enhancing wallets
JoinMarket CoinJoin implementation (Increase privacy and/or Earn interest on bitcoin holdings)
Coinffeine and Bitsquare Decentralized bitcoin exchanges
Keybase and Bitrated Identity & Reputation management
Bitmesh and Telehash Mesh networking
JoyStream BitTorrent client with paid seeding
MORPHiS Decentralized, encrypted internet
Storj and Sia Decentralized file storage
Streamium and Faradam Pay in real time for on-demand services
Abra Global P2P money transmitter network
bitSIM PIN secure hardware token between SIM & Phone
Identifi Decentralized address book w/ ratings system
Coinometrics Institutional-level Bitcoin Data & Research
Blocktrail and BitGo Multisig bitcoin API
Bitcore Open source Bitcoin javascript library
Insight Open source blockchain API
Leet Kill your friends and take their money ;)

Bitcoin Units

One Bitcoin is quite large (hundreds of £/$/€) so people often deal in smaller units. The most common subunits are listed below:
Unit Symbol Value Info
millibitcoin mBTC 1,000 per bitcoin SI unit for milli i.e. millilitre (mL) or millimetre (mm)
microbitcoin μBTC 1,000,000 per bitcoin SI unit for micro i.e microlitre (μL) or micrometre (μm)
bit bit 1,000,000 per bitcoin Colloquial "slang" term for microbitcoin
satoshi sat 100,000,000 per bitcoin Smallest unit in bitcoin, named after the inventor
For example, assuming an arbitrary exchange rate of $500 for one Bitcoin, a $10 meal would equal:
For more information check out the Bitcoin units wiki.
Still have questions? Feel free to ask in the comments below or stick around for our weekly Mentor Monday thread. If you decide to post a question in /Bitcoin, please use the search bar to see if it has been answered before, and remember to follow the community rules outlined on the sidebar to receive a better response. The mods are busy helping manage our community so please do not message them unless you notice problems with the functionality of the subreddit. A complete list of bitcoin related subreddits can be found here
Note: This is a community created FAQ. If you notice anything missing from the FAQ or that requires clarification you can edit it here and it will be included in the next revision pending approval.
Welcome to the Bitcoin community and the new decentralized economy!
submitted by BinaryResult to Bitcoin [link] [comments]

Establishing a smart contract commercial scenario: Chainlink, Zk-Snarks and sharding technology work together to make the ultimate killer

This text was translated from Chinese, open following link in Chrome and translate to see all images:
https://bihu.com/article/1242138347
EDIT: found an English text with pictures:
https://medium.com/@rogerfeng/making-smart-contracts-work-for-business-how-chainlink-zk-snarks-sharding-finally-delivered-8f268af75ca2
Author: Feng Jie translation: Liu Sha
“The highest state of technology is to integrate into the various scenes of everyday life, to fade away from high-tech outerwear and become a part of everyday life.” – Mark Weiser
People in the future will not even think that smart contracts are "innovative." By that time, smart contracts would permeate every aspect of life, and people couldn't even imagine what the era of non-digital currency would look like.
Later historians may divide human business history into two eras, the pre-smart contract era and the post-smart contract era. After all, digital money has brought unprecedented changes to the nature and patterns of business practices in the real world. An anonymous member of the Chainlink community once said: "Smart contracts can change the DNA of the business."
Of course, like all the technological revolutions of the past, smart contracts also need to reach a "tipping point" to truly achieve large-scale applications. So we need to ask ourselves two questions:
  1. What exactly is this so-called tipping point?
  2. As of August 2019, have we reached this tipping point?
To reach the tipping point means unlocking the ultimate nirvana of business.
Tipping point We can think about this issue from the perspective of mainstream companies. Imagine what a perfect smart contract platform should look like. What characteristics should this platform have? Or what features must be possessed?
To reach the tipping point, you must establish a public chain with the following four characteristics:
  1. Privacy protection
  2. In addition to the cryptocurrency, the transaction can also be settled in mainstream legal currency and comply with the regulatory requirements of financial markets such as ISO 20022.
  3. Achieve scalability without sacrificing decentralization or security, that is, solving the "impossible triangle problem."
  4. Connect the external data under the chain, that is, solve the "prophecy problem."
Now that we have Chainlink, zk-snarks and sharding technology, we have reached this tipping point.
Next, let's explore how this ultimate nirvana is actually made. Our discussion will be mainly from the perspective of Ethereum, which is still the top smart contract platform for community size and mainstream applications.
So what about the private chain?
Before delving into it, I want to take the time to solve an unavoidable problem. The mainstream view has always believed that the private chain is a more suitable solution for the enterprise. Therefore, we first dialectically analyze the two advantages and two major drawbacks of the private chain.
Disadvantages
  1. Centralization leads to relatively lower security
It's not surprising that IBM and Maersk's blockchain freight alliances have a hard time finding customers who are willing to join. How can other freight companies be willing to let their biggest competitors (Maersk) verify their trading data? Only madmen dare to do this.
  1. The staking of the horses occupy the hills:
This problem is even more serious than centralization. John Wolpert, co-founder of the IBM blockchain, wrote an excellent article called Breaking the Barriers to Realize Security: Why Companies Should Embrace the Ethereum Public Chain, which he covered in detail in the article.
If every company builds its own private chain, it will lead to chaos in the mountains. Today's B2B ecosystem is very complex. Imagine the innumerable private chains of the world intertwined to form a huge "spider web." This is not only cost-effective, but also not scalable.
The starting point of the blockchain is to break down barriers instead of building more barriers.
"One day, one of your big buyers called you to ask if you want to join their private chain. You promised. The next day you received a call from the wholesaler to ask you the same question. Then came the supplier, freight. Business, insurance company or even bank, and each company may have several private chains! Finally you have to invest a lot of time and cost to operate dozens of blockchains every day . If there are partners to let you join them at this time The private chain, you might say "Forget it, or fax me the order!" ”—Paul Brody (Ernst & Young)
“Every time you connect two private chains through a system integrator, you have to pay a lot of money .”
Advantage
  1. Scalability: With the Ethereum public chain implementing fragmentation technology, this advantage is rapidly shrinking.
  2. Privacy protection: At this stage, the classification of public chain / private chain is actually not very accurate. The Aztec , Zether, and Nightfall protocols (both based on the zk-snarks protocol) effectively provide a "private chain model" for the Ethereum public chain, allowing it to switch between the public and private chains. Therefore, a more accurate classification should be the alliance chain and the public chain.
By 2020, the label of the public chain/private chain will gradually disappear. The public and private chains will no longer be two opposing concepts. Instead, the concept of publicly traded/private transactions and confidential contracts/open contracts is changed, and the scope of these transactions and contracts varies according to specific needs, either bilaterally or multilaterally or even publicly.
All in all, the private chain has two major drawbacks compared to the public chain. Not only that, but the two major advantages of the private chain are also rapidly disappearing.
“Technology will evolve over time, so there will be a variety of solutions to solve existing problems. Ultimately, the public-chain platform will have the same performance, scalability and data privacy as the private chain, while at the same time ensuring security and Decentralized."
Feature 1: Privacy protection (predictive machine and public chain privacy)
Enigma founder Guy Zyskind once joked in his MIT graduation thesis that smart contracts can only become commercially valuable if they become "confidential contracts." He later proposed that zk-snarks and Trusted Execution Environment (TEE) are the most promising solutions. He said nothing wrong.
What is zk-snarks ? Zk-snarks is a zero-knowledge proof mechanism (ZPK). So what is the zero-knowledge proof mechanism? In short: a zero-knowledge proof mechanism allows you to prove that you own certain information without revealing the content of the information.
Vitalik Buterin explained this concept in detail from a technical point of view in an article published in 2017. Hackernoon also wrote an excellent article explaining the concept in an easy-to-understand way with the example of a five-year-old child and Halloween candy.
What is the trusted execution environment? The trusted execution environment lets the code run on closed hardware, and
1 ) The guarantee result cannot be tampered with
2 ) Protecting absolute privacy, even hardware running code can't get confidential information.
The most well-known trusted execution environment is Intel SGX. Chainlink has established a partnership with Intel SGX after acquiring Tom Crier.
Ernst & Young released the Nightfall agreement on Github on May 31, 2019. A well-known accounting firm with a history of 100 years will choose to add privacy features to the public chain instead of developing a private chain. This is a problem.
Since then, the community has been actively developing on this basis, not only to improve the code, but also to develop a plug-and-play Truffle Box for those who are not good at writing code. Blockchain communities and businesses generally rarely collaborate, so these collaborations fully demonstrate the popularity of Nightfall.
Prior to this, two zk-snark-based Ethereum public chain privacy protocols were introduced, namely AZTEC (Consensys) and Zether (Stanford, JPMorgan Chase). An obvious trend is slowly taking shape.
In the field of oracles, Chainlink uses both zero-knowledge proof and a trusted execution environment to complement each other. Trusted execution environments guarantee data privacy, even for nodes that cannot access data (this feature is critical for bank accounts and API keys).
Chainlink is still trying to implement a trusted execution environment, and nodes can access data temporarily, so authentication services are also needed. Although the credible execution environment is almost 100% foolproof, in theory, a strong shield has a spear that can penetrate it. Therefore, the team is currently trying to run zk-snarks in a trusted execution environment (Thomas Hodges mentioned this in the 2019 Trufflecon Q&A session). The combination of the two can form a very robust and complete system. The attacker must find a way to strip all the layers of an onion at the same time to make any effective attack (and it is already difficult to peel off a layer of skin).
“Chainlink combines a trusted execution environment with zero-knowledge proof to build what we call a defense-in-depth system, which means they provide all the tools needed for smart contract developers, including trusted execution environments, multiple nodes, and Data sources, fine margins, reputation systems, asymmetric encryption, zero-knowledge proofs, WASM, and OTP+RNG, these features allow smart contract developers to adjust the confidentiality and cost of contracts based on specific budget and security needs. Machine, Chainlink and its four major application scenarios》
In the future, zk-snarks may be upgraded to zk-starks (a fully transparent zero-knowledge proof mechanism) that protects the system from quantum computer attacks. And the best thing about zk-starks is that it's more scalable than zk-snarks. In other words, it can better protect privacy, and the cost of gas will not increase.
If you want to learn more about zk-starks, you can read a popular science article written by Adam Luciano.
Feature 2: Scalability (scalability of predictive machines and public chains) To understand this problem, we can make an analogy like this:
A public chain is like a large enterprise, and every employee (ie, a node) must attend each meeting (ie, confirm each transaction). Imagine how inefficient this company is! Only customers who have a lot of money (ie gas fees) can get their requests to the forefront. And this is not the most serious problem. The most serious problem is that the more employees (ie nodes) who join the company, the harder it is for the company to function properly! In the end, the company not only failed to expand linearly, but also became smaller and smaller. Although this guarantees decentralization and security to the greatest extent, the price is completely abandoning scalability.
There are various temporary fire fighting solutions, but no one solution can completely solve this "impossible triangle problem." For example, EOS uses the DPOS mechanism (share authorization certification mechanism), where only 21 super nodes (many of which are well-known nodes) are responsible for verifying all transactions.
Sidechains (such as Bitcoin's Lightning Network and Ethereum's lightning network) guarantee scalability and decentralization at the expense of security.
So how to use the fragmentation technology to solve this problem? Let's make another analogy:
In reality, there is only one company that is not too much to ask everyone to attend all meetings, that is, small start-ups (that is, private chains that limit the number of nodes).
In most cases, large companies divide employees into thousands of teams (ie, shards), and each team's principal (ie, the certifier) ​​is responsible for reporting to the senior management (ie, the main chain). If people from different teams need to collaborate (and sometimes also), then they can collaborate by cross-shard receipts. If a new employee joins the company, the team can be re-segmented (ie re-sharding). This allows for linear expansion.
In fact, the process of developing a start-up to a large enterprise is surprisingly similar to the process of Ethereum 1.0 developing into Ethereum 2.0.
“The Ethereum 1.0 period is that several people who are alone are trying to build a world computer; and Ethereum 2.0 will really develop into a world computer.” Vitalik Buterin said in the first piece of the workshop.
Since Ethereum was not originally built on the principle of fragmentation, it takes seven steps to achieve the goal (this is a bit like the word morphing solitaire game). The first step is planned for January 3, 2020.
At the same time, developers can use many other blockchain platforms designed based on the fragmentation principle. Some platforms, including Zilliqa and Quarkchain, are already compatible with Chainlink.
If you want to see more in-depth technical analysis of shards, check out an article by Ramy Zhang.
In the field of oracles, Chainlink has the following two characteristics:
1 ) Use Schnorr threshold signatures to quickly reach consensus in a cost-effective manner. The next version of the chain only needs 16,000 gas.
2 ) We have previously discussed the need to use trusted execution environment hardware to ensure that nodes cannot access sensitive data. Since you have hardware in your hand, you can use it to do some actual computing work, so that you can properly reduce the amount of computation on the smart contract platform.
"With the SGX system (Town Crier) and zero-knowledge proof technology, the oracle can be truly reliable and confidential, so the boundaries between the oracle and the smart contract are beginning to flow... Our long-term strategy... is to let The predictor becomes the key chain of computing resources used by most smart contracts. We believe that the way to achieve this goal is to perform chain operations in the oracle to meet various computing needs, and then send the results to the smart contract."Chainlink White Paper, Section 6.3 (26 pages)
Of course, this “long-term strategy” has certain risks, unless Chainlink can implement a trusted execution environment and its service provider ecosystem can achieve a qualitative leap. However, the Chainlink team's vision is absolutely forward-looking: under-chain computing is a key factor in ensuring that blockchains are not dragged down by large amounts of IoT data.
The Internet of Things has dramatically increased the current state of big data. At present, most of the data is still generated on the software side, and it is not real-time data, and most of the data in the future will be real-time data generated on the sensor side. One of the big drawbacks of real-time data is that it increases storage pressure. For example, Coughlin Associates expects an unmanned car to generate 1G of data per second. This means that the same car will produce 3.6T data per hour!
The only viable solution is to do real-time analysis of the data, rather than storing the data first. In the Global Cloud Index: 2016-2021 Forecast and Methodology White Paper, Cisco predicts that more than 90% of data in 2021 will be analyzed in real time without storage.
That is to say, the essence of data is that it can only exist in just one instant. The nature of the blockchain is not to be modified, so the two are as incompatible as water and oil.
The solution is to analyze the raw data under the chain, extract the meaningful results and send them to the blockchain. The combination of fragmentation technology and trusted execution environment forms a new computing architecture, similar to the cloud computing-fog computing-edge computing architecture.
It should be noted here that it is good to improve computing power, but this is not the main purpose of the blockchain.
The fundamental purpose of the blockchain is not to reduce the original cost of computing and data storage. After all, technology giants such as Amazon, Microsoft, Google, Salesforce, Tencent, Alibaba, and Dropbox have built world-class cloud services. The centralized server wins high computational efficiency (but the blockchain will greatly improve the computational efficiency through fragmentation technology, and will catch up with it one day). The value of the blockchain is to reduce the cost of building trust. Nick Szabo calls it "social scalability" (this is a relative concept to the "operational" scalability we have been talking about). Vitalik Buterin also made it clear that the meaning of smart contracts is to accept small arithmetic delay penalties in exchange for a substantial reduction in "social costs."
Alex Coventry of the Chainlink team once raised the question: "We have missed many opportunities for cooperation and reciprocity because we can't confirm whether the other party will fulfill the promise?"
Is there any potential for data storage projects like Siacoin and IPFS? What about decentralized computing projects like SONM and Golem?
Siacoin 's core value proposition is not that its computing efficiency is higher than traditional cloud services. The cost of computing is required to split, repeat, and reassemble data. And companies are more capable of buying the latest and greatest hardware than individuals. Siacoin's core value proposition is to process data in an Airbnb-like mode, so management fees will be lower than traditional models. It also generates additional social value, such as flood control, privacy and security, and anti-censorship.
The same is true of Golem and SONM. Even with the most efficient protocol, it is inevitable that a small amount of delay will be imposed and fined to coordinate the hardware of different geographical locations. Therefore, under the condition that all other conditions are equal, the centralized hardware still has the advantage of faster computing speed. However, the core value proposition of the above project is to use the Airbnb-like model to reduce management costs.
We must strictly distinguish between "social scalability" and "operational scalability", and the two cannot be confused. I will explain these two concepts in detail when I discuss "Magic Bus and Lightweight Library" later.
Feature 3: Compatible with legal currency
Most mainstream companies do not regard cryptocurrencies as "real currencies." In addition, even if someone wants to use cryptocurrency for trading, it is very difficult to actually operate because of its high price volatility. I discussed the “price volatility problem” in detail in Chapters 8 and 9 of the previous article. These problems do not completely erase the existence value of cryptocurrencies, because cryptocurrencies also have many advantages that legal currency does not have. I am just emphasizing what we need to know more about the comfort zone of mainstream companies.
Chainlink acts as a universal API connector that triggers open banking payments. Chainlink is fully compliant with ISO 20022 and has established a long-term partnership with SWIFT (it is worth mentioning that SWIFT has not been updated for a long time and hopes to be updated after the SIBOS 2019 conference).
PSD2 will take effect on September 14, 2019. All banks in the EU will all comply with this new regulation by then. In other words, the bank must put all account data in the "front end" and can be called through the API. The approved third party (ie, the Chainlink node) can trigger the payment directly without the payment service provider.
Although the United States and Japan have not adopted similar laws, many banks still spontaneously promote the development of open banks. Banks open APIs to third-party developers to create new revenue streams and customer experiences that ultimately increase profitability. In addition, this will allow banks to better respond to competitors in the mobile payment and financial technology sectors in an APP-centric economic model.
As this open banking revolution continues, Chainlink will connect smart contracts with the world's major currencies (US dollar, euro, yen, etc.).
Only one external adapter is required to connect to the authenticated API. From a programming perspective, it is relatively simple to allow everyone in the community to contribute code to the code base (and thus achieve scalability). Chainlink has released adapters for PayPal and Mister Tango (European version of PayPal).
Feature 4: Data connection with the chain
Chainlink has been working on solving the "prophecy problem" and successfully succeeded on the main online line on May 30, 2019.
Chainlink has made many achievements in just a few months. Provable (formerly Oraclize) was successfully used on the Chainlink node and finally settled the debate about whether the predictor should be centralized or decentralized.
Synthetic Ether lost 37 million Ethercoins in a hack because it did not connect to Chainlink. Fortunately, the money was finally recovered and did not cause any loss. This lesson illustrates the importance of decentralized oracles.
In addition, both Oracle and Google have partnered with Chainlink to monetize their API data and create a virtuous circle to capture the market opportunities that Facebook missed.
There are new nodes coming online every week, and the network activity has been very high. The Chainlink team maintains a list of certified nodes in the documentation and Twitter releases. Twitter user CryptoSponge also set up a new development for the Tableau push update Chainlink team:
Regarding the importance of the current stage in the history of blockchain development, Brad Huston summed it up very brilliantly:
"The biggest problem with cryptocurrencies is to build bridges between cryptocurrencies, fiat currencies and big data. Chainlink is very beautifully narrowing the distance between the three. Now it can even be said: 'The bridge has been built.'"
Magic bus and lightweight library
Let's summarize what we discussed earlier. The real purpose of the blockchain is to reduce the cost of building trust and achieve "social scalability."
Therefore, according to this logic, the main application scenarios of platforms such as Ethereum 2.0 and Zilliqa should be in the B2B field. I quote a sentence I wrote in a previous article:
“My conclusion is: If the smart contract is successful, it will also succeed in the B2B field first.”
The private chain itself is self-contradictory and destined to fail. It has led to the phenomenon of occupying the hills, thus increasing the social cost, which is in opposition to B2B itself, and ultimately it is self-restraint. ”
Before the emergence of fragmentation technology, even simple games (ie, etheric cats) could not be smoothly run on the public chain, let alone dealing with complex B2B contracts and even changing commercial DNA. With the sharding technology, everything is ready.
Despite this, we can't use Ethereum 2.0 as an all-powerful platform. Just now we said that although it is a good thing to speed up the calculation, this is not the real purpose of Ethereum 2.0. And before we also said that due to the irreversible modification of the blockchain, it is not good to deal with a large number of fleeting real-time data of the Internet of Things. In other words, we must be soberly aware that Ethereum 2.0 will not replace traditional web 2.0. Instead, we should make better use of the real advantages of Ethereum 2.0:
“There is a new concept now, that is to think of the Ethereum main network as a global bus... We use the Ethereum 2.0 main network to treat various business resources as a working group on Slack: it can be easily built and integrated. And restructuring. The SAP inventory management system in your company, the dealer's JD Edwards ERP system, and the financial technology partner's tall blockchain system can seamlessly interface, eliminating the need to develop an infrastructure specifically for each partner." - John Wolper describes his ideal "magic bus"
Ethereum 2.0 should be an integration center, not a data center or computing center. It should be a library built specifically to store B2B contract terms (to be honest, even with fragmentation technology, the amount of data is large enough).
We should not expect Ethereum 2.0 to be an all-powerful platform, but rather develop it into a "lightweight library."
If we reorder the pyramid model just now, the architecture of the magic bus is obvious:
Of course, the positional relationship in the above model is not static. With the development of 5G technology, edge computing and IoT sensors, they may bypass the cloud to directly interact (or even bypass the fog end). If the collaboration between Iotex and Chainlink is successful, then the edge can interact directly with the trusted execution environment.
Time will tell if Airbnb's shared data storage and computing model can make management costs lower than the current mainstream Web 2.0 model. Time will also prove whether the market really needs anti-censorship, anti-tampering, security protection and privacy protection. Do users really care about these social values ​​and are willing to pay for them? Do they think these are just the icing on the cake or the most fundamental value?
in conclusion
Whether it is the battle between web2.0 and web3.0 or the battle between cryptocurrency and legal currency, one thing is beyond doubt:
We have reached the tipping point, and the era of smart contracts with commercial value has arrived.
In fact, the only problem at the moment is the time issue, and the main roadblocks have been basically cleared.
  1. When will Ethereum 2.0 finish these 7 stages and be officially released?
  2. When will Chainlink use a trusted execution environment on a large scale? If the cooperation between Intel SGX and Town Crier fails, what alternative plans are there? Will Chainlink communicate with other blockchain teams that plan to use a trusted execution environment (such as Dawn Song's Oasis Labs)?
At present, the main technical problems in the ecosystem have been solved, and now it is only necessary to recruit a group of enthusiastic developers to do the work of “connecting the line”.
Digital currency has changed commercial DNA, and the future is full of possibilities.
The only thing that hinders us now is our own imagination. The future is infinitely imaginative, and the future will be the world of developers. Dapps is already overwhelming. There is no doubt that we have found the ultimate nirvana.
This text was translated from Chinese, open following in Chrome and translate to see all images:
https://bihu.com/article/1242138347
submitted by QuantLink to LINKTrader [link] [comments]

Nvidia (NYSE:NVDA) Fundamental Analysis: Thoughts?

I sat down and analyzed my first stock recently (per the title, I chose to do a fundamental analysis on Nvidia). I would love other user opinions on the analysis. Point out any flaws in logic; it would help me learn this process! My background is in ComputeElectrical Engineering, so I chose to analyze Nvidia since I can grasp the CPU/GPU/computing market the easiest. Also, the company's recent increase in the market intrigues me.
Please let me know your opinions!

Important things to note:
Qualitative Fundamental Analysis:
Quantitative Fundamental Analysis:

If you have made it this far to the bottom, thank you for the read! I hope you found this helpful. Please leave your thoughts, opinions, and recommendations on the analysis and the stock itself. Also, I am nowhere close to a financial adviser, so do not take this analysis as investment advice. I am merely trying to present and consolidate the information I have found.
submitted by nuccom to stocks [link] [comments]

/r/Bitcoin FAQ - Newcomers please read

Welcome to the /Bitcoin Sticky FAQ

You've probably been hearing a lot about Bitcoin recently and are wondering what's the big deal? Most of your questions should be answered by the resources below but if you have additional questions feel free to ask them in the comments.
Some great introductions for new users are My first bitcoin, Bitcoin explained and ELI5 Bitcoin. Also, the following videos are a good starting point for understanding how bitcoin works and a little about its long term potential:
Also have to give mention to Lopp.net, the Princeton crypto series and James D'Angelo's Bitcoin 101 Blackboard series. Some excellent writing on Bitcoin's value proposition and future can be found at the Satoshi Nakamoto Institute. Bitcoin statistics can be found here, here and here. Developer resources can be found here, here and here. Peer-reviewed research papers can be found here. Potential upcoming protocol improvements here. Scaling resources here. The number of times Bitcoin was declared dead by the media can be found here (LOL!), and of course Satoshi Nakamoto's whitepaper that started it all! :)
Key properties of bitcoin

Where can I buy bitcoins?

Bitcoin.org, BuyBitcoinWorldwide.com and Howtobuybitcoin.io are helpful sites for beginners. You can buy or sell any amount of bitcoin and there are several easy methods to purchase bitcoin with cash, credit card or bank transfer. Some of the more popular resources are below, also, check out the bitcoinity exchange resources for a larger list of options for purchases.
Bank Transfer Credit / Debit card Cash
Gemini Bitstamp LocalBitcoins
Bitstamp Bitit Mycelium LocalTrader
BitFinex Cex.io LibertyX
Cex.io CoinMama WallofCoins
Xapo Spectrocoin BitcoinOTC
Kraken Luno BitQuick
itBit
HitBTC
Bitit
Bisq (decentralized)
Luno
Spectrocoin
Here is a listing of local ATMs. If you would like your paycheck automatically converted to bitcoin use Bitwage.
Note: Bitcoins are valued at whatever market price people are willing to pay for them in balancing act of supply vs demand. Unlike traditional markets, bitcoin markets operate 24 hours per day, 365 days per year. Preev is a useful site that that shows how much various denominations of bitcoin are worth in different currencies. Alternatively you can just Google "1 bitcoin in (your local currency)".

Securing your bitcoins

With bitcoin you can "Be your own bank" and personally secure your bitcoins OR you can use third party companies aka "Bitcoin banks" which will hold the bitcoins for you.
Android iOs Desktop
Samouari BreadWallet Electrum
Another interesting use case for physical storage/transfer is the Opendime. Opendime is a small USB stick that allows you to spend Bitcoin by physically passing it along so it's anonymous and tangible like cash.
Note: For increased security, use Two Factor Authentication (2FA) everywhere it is offered, including email!
2FA requires a second confirmation code to access your account, usually from a text message or app, making it much harder for thieves to gain access. Google Authenticator and Authy are the two most popular 2FA services, download links are below. Make sure you create backups of your 2FA codes.
Google Auth Authy
Android Android
iOS iOS

Where can I spend bitcoins?

Check out spendabit or bitcoin directory for some good options, some of the more commons ones are listed below.
Store Product
Gyft Gift cards for hundreds of retailers including Amazon, Target, Walmart, Starbucks, Whole Foods, CVS, Lowes, Home Depot, iTunes, Best Buy, Sears, Kohls, eBay, GameStop, etc.
Steam, HumbleBundle, Games Planet, itch.io, g2g and kinguin For when you need to get your game on
Microsoft Xbox games, phone apps and software
Spendabit, Overstock, The Bitcoin Directory and BazaarBay Retail shopping with millions of results
ShakePay Generate one time use Visa cards in seconds
NewEgg and Dell For all your electronics needs
Bitwa.la, Coinbills, Piixpay, Bitbill.eu, Bylls, Coins.ph, Bitrefill, LivingRoomofSatoshi, Hyphen.to, Coinsfer, More #1, #2 Bill payment
Menufy, Takeaway, Thuisbezorgd NL, Pizza For Coins Takeout delivered to your door!
Expedia, Cheapair, Lot, Destinia, BTCTrip, Abitsky, SkyTours, Fluege the Travel category on Gyft and 9flats For when you need to get away
BitHost VPS service
Cryptostorm, Mullvad, and PIA VPN services
Namecheap, Porkbun For new domain name registration
Stampnik Discounted USPS Priority, Express, First-Class mail postage
Reddit Gold Premium membership which can be gifted to others
Coinmap and AirBitz are helpful to find local businesses accepting bitcoins. A good resource for UK residents is at wheretospendbitcoins.co.uk.
There are also lots of charities which accept bitcoin donations, such as Wikipedia, United Way, ACLU and the EFF. You can find a longer list here.

Merchant Resources

There are several benefits to accepting bitcoin as a payment option if you are a merchant;
If you are interested in accepting bitcoin as a payment method, there are several options available;

Can I mine bitcoin?

Mining bitcoins can be a fun learning experience, but be aware that you will most likely operate at a loss. Newcomers are often advised to stay away from mining unless they are only interested in it as a hobby similar to folding at home. If you want to learn more about mining you can read more here. Still have mining questions? The crew at /BitcoinMining would be happy to help you out.
If you want to contribute to the bitcoin network by hosting the blockchain and propagating transactions you can run a full node using this setup guide. Bitseed is an easy option for getting set up. You can view the global node distribution here.

Earning bitcoins

Just like any other form of money, you can also earn bitcoins by being paid to do a job.
Site Description
WorkingForBitcoins, Bitwage, XBTfreelancer, Cryptogrind, Bitlancerr, Coinality, Bitgigs, /Jobs4Bitcoins, Rein Project Freelancing
OpenBazaar, Purse.io, Bitify, /Bitmarket, 21 Market Marketplaces
Streamium.io, XOtika.tv NSFW, /GirlsGoneBitcoin NSFW Video Streaming
Bitasker, BitforTip Tasks
Supload.com, SatoshiBox, JoyStream, File Army File/Image Sharing
CoinAd, A-ads, Coinzilla.io Advertising
You can also earn bitcoins by participating as a market maker on JoinMarket by allowing users to perform CoinJoin transactions with your bitcoins for a small fee (requires you to already have some bitcoins)

Bitcoin Projects

The following is a short list of ongoing projects that might be worth taking a look at if you are interested in current development in the bitcoin space.
Project Description
Lightning Network, Amiko Pay, and Strawpay Payment channels for network scaling
Blockstream, Rootstock and Drivechain Sidechains
21, Inc. Open source library for the machine payable web
ShapeShift.io Trade between bitcoins and altcoins easily
Open Transactions, Counterparty, Omni, Open Assets, Symbiont and Chain Financial asset platforms
Hivemind and Augur Prediction markets
Mediachain Decentralized media library
Tierion and Factom Records & Titles on the blockchain
BitMarkets, DropZone, Beaver and Open Bazaar Decentralized markets
Samourai and Dark Wallet - abandoned Privacy-enhancing wallets
JoinMarket CoinJoin implementation (Increase privacy and/or Earn interest on bitcoin holdings)
Coinffeine and Bisq Decentralized bitcoin exchanges
Keybase and Bitrated Identity & Reputation management
Telehash Mesh networking
JoyStream BitTorrent client with paid seeding
MORPHiS Decentralized, encrypted internet
Storj and Sia Decentralized file storage
Streamium Pay in real time for on-demand services
Abra Global P2P money transmitter network
bitSIM PIN secure hardware token between SIM & Phone
Identifi Decentralized address book w/ ratings system
BitGo Multisig bitcoin API
Bitcore Open source Bitcoin javascript library
Insight Open source blockchain API
Leet Kill your friends and take their money ;)

Bitcoin Units

One Bitcoin is quite large (hundreds of £/$/€) so people often deal in smaller units. The most common subunits are listed below:
Unit Symbol Value Info
millibitcoin mBTC 1,000 per bitcoin SI unit for milli i.e. millilitre (mL) or millimetre (mm)
microbitcoin μBTC 1,000,000 per bitcoin SI unit for micro i.e microlitre (μL) or micrometre (μm)
bit bit 1,000,000 per bitcoin Colloquial "slang" term for microbitcoin
satoshi sat 100,000,000 per bitcoin Smallest unit in bitcoin, named after the inventor
For example, assuming an arbitrary exchange rate of $10000 for one Bitcoin, a $10 meal would equal:
For more information check out the Bitcoin units wiki.
Still have questions? Feel free to ask in the comments below or stick around for our weekly Mentor Monday thread. If you decide to post a question in /Bitcoin, please use the search bar to see if it has been answered before, and remember to follow the community rules outlined on the sidebar to receive a better response. The mods are busy helping manage our community so please do not message them unless you notice problems with the functionality of the subreddit. A complete list of bitcoin related subreddits can be found here
Note: This is a community created FAQ. If you notice anything missing from the FAQ or that requires clarification you can edit it here and it will be included in the next revision pending approval.
Welcome to the Bitcoin community and the new decentralized economy!
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