Bitcoin, President of ICBC

according to foreign media reports, with the growing popularity of bitcoin, central bank governors around the world have also expressed their views on this digital currency

Federal Reserve Bank of the United States

in December last year, at the monetary policy meeting of the Federal Reserve Bank of the United States, Janet Yellen, chairman of the Federal Reserve Board, was asked what she thought of bitcoin

"the Federal Reserve Bank will not make any policy on bitcoin. Instead, we will only ensure that the banking institutions we supervise pay close attention to digital currency and properly manage their interaction with traders in the market. Moreover, we will monitor whether these banking institutions have fulfilled their responsibilities to combat money laundering and ensure the safety of banks. " Yellen said

at the end of November last year, Jerome Powell, who will replace Yellen as chairman of the Federal Reserve in February this year, also expressed his views on cryptocurrency. Cryptocurrencies "don't matter now" because "they're not big enough," he said

European Central Bank

in October last year, Mario Draghi, President of the European Central Bank, said that cryptocurrency was not "mature" enough for the central bank to regulate management

"for anything new, people are always full of expectations, but also feel very uncertain. Now, as far as bitcoin and other cryptocurrencies are concerned, we don't think they are mature enough for us to consider standardized management. " He said

Draghi pointed out that tools like bitcoin have both advantages and disadvantages, and we need to weigh them carefully

"a lesson of the great financial crisis is financial innovation. As far as bitcoin is concerned, it is a financial and technological innovation. We should pay close attention to its potential risks while paying attention to it. " He said

Bank of Canada

in December last year, Stephen poloz, President of the Bank of Canada, also spent some time discussing cryptocurrency. He claims that buying digital currency is a gamble, not an investment

"perhaps no one can say clearly what their real value is. One can at most say that buying digital currency is buying risk. This makes it closer to gambling than investment. " "For people who want to buy cryptocurrency, what I want to say is that you should read the collateral to make sure you know what you're investing in," boloz said

"bank staff are studying the conditions under which the central bank is more suitable to issue its own digital currency for retail transactions." He said

Reserve Bank of Australia

in December last year, Reserve Bank of Australia President Philip Lowe talked about bitcoin in a speech. He pointed out that this kind of digital currency will not be used in daily payment activities, and it can not be accepted so soon

moreover, when bitcoin is only used as a payment tool, it "is more likely to attract those who want to trade in black or illegal economic activities."

Bank of Japan

at the end of 2017, Haruhiko Kuroda, President of Bank of Japan, said the price fluctuation of bitcoin was "extremely abnormal"

when asked if there will be a bubble in bitcoin, he replied, "I may not be qualified to evaluate it, but if you look at its trend, you will see that its price fluctuation is very abnormal. If you want to ask whether bitcoin has the same function as money, that is, as a payment or settlement tool, then my answer is No

investment should be cautious and private letter from mining machinery is needed

Suppose you understand the blockchain. To put it simply, the blockchain generates a new block every ten minutes to store all the transaction information in the blockchain. This block is equivalent to a network account book, which correctly time stamps all the transactions of the whole network in the past ten minutes. The question is who will build it? The "miner" on the blockchain is to compete for the bookkeeping right of a block in the past ten minutes. The rule of competition is to solve the sha256 problem while correctly bookkeeping. Who can prove that his computer has the fastest computing power can compete for the legal bookkeeping right of the block in the past ten minutes. This is the "mining" process. In the bitcoin blockchain, miners who dig mines can get certain bitcoin rewards. Therefore, miner's more essential function is "bookkeeper"

in his bitcoin white paper, Nakamoto describes in detail the process of establishing the credit system:

Step 1: in order to make the whole network recognize effective, every transaction must be broadcast to each node (node: miner)

Step 2: each miner node should correctly stamp each transaction in the ten minutes and record it in that block

Step 3: each miner node should compete for the legal bookkeeping right of this 10 minute block by solving the sha256 problem, and strive for the reward of 25 bitcoins (50 bitcoins every 10 minutes in the first four years, decreasing by half every four years)

Step 4: if a miner node solves the ten minute sha256 problem, TA will publish all the time stamped transactions recorded in the ten minute block of TA to the whole network, which will be checked by other miner nodes in the whole network

Step 5: other miners in the whole network check the correctness of the block's accounting (because they are also stamping the time stamp for accounting, but they do not compete for the legal block's accounting right, so there is no reward). If there is no error, they will compete for the next block after the legal block, thus forming a single block chain of legal accounting, That is the general ledger of bitcoin payment system - blockchain

generally speaking, each transaction must go through six block confirmations, that is, six ten minute bookkeeping, before it can be recognized as a legal transaction on the blockchain. The following is the accounting format of bitcoin:

so the so-called "bitcoin" is such a billing system: it includes the owner using the private key to make an electronic signature and pay to the next owner, and then the "miners" of the whole network stamp the account to form a blockchain Network)

if you want to learn more about blockchain information, it is recommended that you use Baijia, mustard circle and other popular B circle media. The amount and richness of information are more and better than those on the general network. If you want to ask technical questions, you can take a look at the links below, hoping to help you with the

Web links

Invisible bitcoin can not only make people rich or poor overnight, but also bring people worry about their lives

after the above news came out, a spokesperson of exmo told the daily telegraph that we are doing our best to speed up the search for Lerner and welcome all clues from the outside world. Exmo's business is running as usual and all users' funds are absolutely safe. According to the company's official website, the platform has more than 900000 users

after the kidnapping incident attracted public attention, exmo also announced on official twitter on Thursday that it had been attacked by DDoS (distributed denial of service) with the intention of destroying platform transactions

according to Wall Street reports, at the beginning of this month, when bitcoin rose to more than US $13000, the payment system of nice hash, the world's largest digital currency mining platform, was hacked and bitcoin in users' wallets was stolen. Bitcoin millionaire, a bitcoin information website, has since estimated that as many as 4736 bitcoins were stolen by hackers, with a total value of more than $62 million

interestingly, as a foreign netizen imagined, after the kidnappers received the ransom, if bitcoin continued to appreciate, it would be OK. If bitcoin collapsed before the gloves turned, wouldn't it be a "huge loss"

on Thursday (December 28), the South Korean government announced the countermeasures to combat virtual currency speculation, and considered closing some virtual currency transactions, so as to curb excessive speculation. In addition, the South Korean government has decided to implement the real name system of virtual currency trading and expand the investigation authority of the Fair Trade Commission, the anti-monopoly law enforcement agency

the Indian authorities also issued a warning. On Friday, India's finance ministry warned investors about the risks of cryptocurrencies such as bitcoin, saying digital currency investments look like a Ponzi scheme, Reuters reported. In a statement, India's Ministry of Finance said investors and other participants in digital currency transactions were "entirely at their own risk" and advised that it was best to avoid such investments

but from the perspective of optimists, bitcoin is not as static as gold. As a virtual currency, its software code is constantly developing, and its functions can be constantly adjusted, improved and updated, and its value can be realized in unimaginable ways, such as, Many bitcoin fans are looking forward to bitcoin's "lightning network" (an improved way to facilitate payment). If bitcoin gets more attractive functions in the process of continuous evolution, people can even use it for convenient and fast cross-border payment

according to China Securities Journal, based on the sustainability of bitcoin development, bitcoin supporters believe that even if the market value of cryptocurrency expands to 20 times the current value, the market will not go crazy. However, as far as bitcoin itself is concerned, with more and more new technologies coming out, bitcoin's share in the cryptocurrency market will show a downward trend in the future

first, all bitcoin development teams are conservative and complacent, no longer absorbing the latest scientific and technological achievements to improve themselves, resulting in the emergence of a new digital currency with all aspects of technical indicators exceeding bitcoin, It is widely accepted by the society and then replaces bitcoin. This is the failure of bitcoin, but also the success of virtual digital currency

Second, there are serious loopholes in the bitcoin protocol or wallet software, which lead to the security of the whole bitcoin system can not be guaranteed, a large area of funds are stolen, sold at a low price and uncontrollable in the short term, and the social confidence in bitcoin is completely lost

so. In this world, money is easy to use

the main reason is that central banks have been printing money crazily in recent years, resulting in a large amount of devaluation of cash and more hot money in the market. As a result, part of the money has poured into the bitcoin market, resulting in the phenomenon of inflated prices ring this period, bitcoin hit a new high again, breaking through the $16000 mark, with the highest intraday price of $16427. At the same time, the total market value of bitcoin has exceeded 300 billion US dollars. If ranked by the way of assets, its market value has exceeded the total market value of instrial and Commercial Bank of China. This is also the first time that bitcoin has rebounded since the downturn, and the highest price has broken through again

institutions is that because they need to pay capital gains tax, many large institutions will hold bitcoin for a long time after they enter the bitcoin market. Unless there is a big fluctuation, they will not sell in the short term. With the influx of more and more institutions, the price of bitcoin will naturally rise steadily and it can be predicted that this wave of rise will continue for some time