The whole story of bitcoin
Publish: 2021-04-07 04:41:08
1. In June 2011, Symantec issued a warning that botnets are participating in bitcoin; mining & quot; In the middle. This can take up the computing power of the victim's computer, consume extra power, and cause the temperature of the host to rise. Later that month, ABC found an employee using the company's server to mine
some malware also make great use of the parallel computing power of graphics cards. In August 2011, botnet of bitcoin mining was discovered, and Mac OS X infected by Trojan horse was also discovered to mine bitcoin.
on June 19, 2011, security vulnerability of mt.gox (Magic: abbreviation of the gathering online exchange) bitcoin trading center caused the price of 1 bitcoin to drop to 1 cent (although other transactions were not affected). The reason is that a hacker stole the user's mtgox certificate from the computer infected with the Trojan horse, so he transferred bitcoin to his own account and sold it, resulting in a large number of "ask" requests at that price. A few minutes later, mtgox shut down and cancelled the abnormal transactions in the hacking incident, making the price of bitcoin rebound back to $15. In the end, the bitcoin exchange rate went back to what it was before the crash. Accounts equivalent to more than $8750000 were affected
in July 2011, the operator of bitomat, the world's third largest bitcoin trading center, announced the loss of access rights to the wallet.dat file that records 17000 bitcoins (about 220000 US dollars). At the same time, announced the decision to sell services to make up for the loss of users
in August 2011, mybitcoin, one of the processing centers of common bitcoin transactions, announced that it had been attacked by hackers and shut down. Involving 49% of customers' deposits, more than 78000 bitcoins (then equivalent to about $800000) are missing
in early August 2012, bitconica was sued in the San Francisco court for damages of about $460000. In 2012, bitconica was attacked twice by hackers, accused of ignoring the security of customers' funds and forging withdrawal applications
in late August 2012, bitcoin savings and trust was shut down by its owner, leaving about US $5.6 million in debt. At the same time, he was accused of operating the Ponzi scheme. In September 2012, the securities and Exchange Commission began to investigate the case
in September 2012, bitfloor trading center was also hacked, and 24000 bitcoins (about US $250000) were stolen. Bitfloor was suspended. Bitfloor resumed operations in the same month, and its founder said he had reported the theft to the FBI and that he was planning to compensate the victims, but the compensation schele was unclear
in June 2011, a hacker transferred 25000 bitcoins into his account, which is equivalent to 500000 US dollars. The whole transaction could not be traced. Although the owner of bitcoin announced the theft on the Internet, it was useless. The hacker became the first thief of bitcoin
in 2012, 46703 bitcoin worth US $228845 was stolen e to the disclosure of the super management password of the server of the website hosting provider linode. More than 43000 stolen bitcoins belong to bitcoinica, a bitcoin trading platform. Another 3094 bitcoins are owned by Marek palatinus, a Czech programmer. Gavin Andersen, the chief bitcoin programmer, also lost his five bitcoins.
some malware also make great use of the parallel computing power of graphics cards. In August 2011, botnet of bitcoin mining was discovered, and Mac OS X infected by Trojan horse was also discovered to mine bitcoin.
on June 19, 2011, security vulnerability of mt.gox (Magic: abbreviation of the gathering online exchange) bitcoin trading center caused the price of 1 bitcoin to drop to 1 cent (although other transactions were not affected). The reason is that a hacker stole the user's mtgox certificate from the computer infected with the Trojan horse, so he transferred bitcoin to his own account and sold it, resulting in a large number of "ask" requests at that price. A few minutes later, mtgox shut down and cancelled the abnormal transactions in the hacking incident, making the price of bitcoin rebound back to $15. In the end, the bitcoin exchange rate went back to what it was before the crash. Accounts equivalent to more than $8750000 were affected
in July 2011, the operator of bitomat, the world's third largest bitcoin trading center, announced the loss of access rights to the wallet.dat file that records 17000 bitcoins (about 220000 US dollars). At the same time, announced the decision to sell services to make up for the loss of users
in August 2011, mybitcoin, one of the processing centers of common bitcoin transactions, announced that it had been attacked by hackers and shut down. Involving 49% of customers' deposits, more than 78000 bitcoins (then equivalent to about $800000) are missing
in early August 2012, bitconica was sued in the San Francisco court for damages of about $460000. In 2012, bitconica was attacked twice by hackers, accused of ignoring the security of customers' funds and forging withdrawal applications
in late August 2012, bitcoin savings and trust was shut down by its owner, leaving about US $5.6 million in debt. At the same time, he was accused of operating the Ponzi scheme. In September 2012, the securities and Exchange Commission began to investigate the case
in September 2012, bitfloor trading center was also hacked, and 24000 bitcoins (about US $250000) were stolen. Bitfloor was suspended. Bitfloor resumed operations in the same month, and its founder said he had reported the theft to the FBI and that he was planning to compensate the victims, but the compensation schele was unclear
in June 2011, a hacker transferred 25000 bitcoins into his account, which is equivalent to 500000 US dollars. The whole transaction could not be traced. Although the owner of bitcoin announced the theft on the Internet, it was useless. The hacker became the first thief of bitcoin
in 2012, 46703 bitcoin worth US $228845 was stolen e to the disclosure of the super management password of the server of the website hosting provider linode. More than 43000 stolen bitcoins belong to bitcoinica, a bitcoin trading platform. Another 3094 bitcoins are owned by Marek palatinus, a Czech programmer. Gavin Andersen, the chief bitcoin programmer, also lost his five bitcoins.
2.
It was in 2017 that China announced that bitcoin trading was not allowed in China. Overnight, all exchanges withdrew from the Chinese market. Because of this news, bitcoin once plummeted. This is the general 94 event
e to the decentralized programming adopted by the bitcoin system, only 25 bitcoins can be obtained every 10 minutes, and by 2140, the maximum number of bitcoins in circulation will reach 21 million
in other words, the bitcoin system can be self-sufficient, resist inflation through coding, and prevent others from destroying these codes
expansion data:
bitcoin price bubble exists, it is a problem that need not be discussed. Whether from the increase or from the value of the currency itself, bitcoin is bubbly. p>
its so-called advantages, such as scarcity, fidelity, strong liquidity, transparency and decentralization, are just the cover of speculation, which can not support its roller coaster like rise. Today's slump is telling
3. Calculation ability is the basis of mathematics. To solve mathematical problems, we must first pass the calculation, and pay attention to the calculation. I am Mr. Wang, focusing on primary school mathematics, sharing problem-solving strategies, promoting interesting mathematics, providing family counseling suggestions, welcome your attention. Computing power is not innate. Basic algorithms are graally acquired after primary school. It takes a lot of time to master the four basic operations of addition, subtraction, multiplication and division. Only after the students establish the real number concept system can they carry out the abstract addition and subtraction symbolic operation. The level of operation ability is reflected in the accuracy, speed and flexibility of operation. The following detailed explanation, for your reference<
to cultivate mathematical computing ability
first of all, it should be clear that the learning of mathematical computing content is a systematic and continuous system. Taking the calculation content of primary school as an example, the learning sequence is as follows:
① the number concept system
the calculation of number is basically deepened with the expansion of number field. From the addition and subtraction method within 20 in grade one to the addition and subtraction method within 10 000 in grade three, the larger number in grade four, integer concept has been basically formed and accompanied by the emergence of decimal concept system, The fifth grade is the key stage of the development of the concept of fraction
from integer to decimal to fraction constitutes the cognitive process of primary school students' number concept development, including the size of number, the comparison of number, cardinal number and ordinal number, odd number and even number, digit number, the combination and decomposition of number, which are the preparation for calculation learning<
② the accuracy and speed of operation
learning sequence determines that each stage of computational learning is very important, which is the foundation of the next stage, and consolidating the foundation is the necessary condition for improving the mathematical computing ability. First of all, the operation must be correct, which is the premise, which requires various kinds of operation practice. The third grade must take ensuring 100% accuracy rate of calculation as the practice goal. Only when the accuracy rate of calculation develops, can we further improve the speed. If the basic oral calculation reaches a perceptual formula, we can get the answer immediately
the higher the grade is, the smaller the proportion of basic computing in cognitive resources is. Computing is a kind of program. Only by turning computing into mathematical facts and extracting them at any time can we put more cognitive resources on more complex problems
there is no shortcut, only diligent practice<
③ flexibility of calculation
don't learn some skills training projects of single integer operation. The flexibility of calculation is reflected in children's enlightenment and application of calculation theory. For example, the first grade's method of rounding up ten is the Enlightenment of rounding up the idea of first calculation. If you don't experience the rules and calculation theory, you can't refine the mathematical thought
the higher the grade is, the more flexible the calculation is. To understand and flexibly use the law of simple calculation is actually a thinking process to reasonably deal with the calculation, so that the calculation can achieve a fast and flexible state. The fourth grade is the key stage of quick calculation and skillful calculation of integers. For example, Mr. Wang's fourth grade extracurricular mathematics knowledge of the calculation section
only by contacting with different types of questions, can we make all kinds of skillful thinking and methods to integrate, and the flexibility of calculation is the key to reflect the level of mathematical calculation ability.
to cultivate mathematical computing ability
first of all, it should be clear that the learning of mathematical computing content is a systematic and continuous system. Taking the calculation content of primary school as an example, the learning sequence is as follows:
① the number concept system
the calculation of number is basically deepened with the expansion of number field. From the addition and subtraction method within 20 in grade one to the addition and subtraction method within 10 000 in grade three, the larger number in grade four, integer concept has been basically formed and accompanied by the emergence of decimal concept system, The fifth grade is the key stage of the development of the concept of fraction
from integer to decimal to fraction constitutes the cognitive process of primary school students' number concept development, including the size of number, the comparison of number, cardinal number and ordinal number, odd number and even number, digit number, the combination and decomposition of number, which are the preparation for calculation learning<
② the accuracy and speed of operation
learning sequence determines that each stage of computational learning is very important, which is the foundation of the next stage, and consolidating the foundation is the necessary condition for improving the mathematical computing ability. First of all, the operation must be correct, which is the premise, which requires various kinds of operation practice. The third grade must take ensuring 100% accuracy rate of calculation as the practice goal. Only when the accuracy rate of calculation develops, can we further improve the speed. If the basic oral calculation reaches a perceptual formula, we can get the answer immediately
the higher the grade is, the smaller the proportion of basic computing in cognitive resources is. Computing is a kind of program. Only by turning computing into mathematical facts and extracting them at any time can we put more cognitive resources on more complex problems
there is no shortcut, only diligent practice<
③ flexibility of calculation
don't learn some skills training projects of single integer operation. The flexibility of calculation is reflected in children's enlightenment and application of calculation theory. For example, the first grade's method of rounding up ten is the Enlightenment of rounding up the idea of first calculation. If you don't experience the rules and calculation theory, you can't refine the mathematical thought
the higher the grade is, the more flexible the calculation is. To understand and flexibly use the law of simple calculation is actually a thinking process to reasonably deal with the calculation, so that the calculation can achieve a fast and flexible state. The fourth grade is the key stage of quick calculation and skillful calculation of integers. For example, Mr. Wang's fourth grade extracurricular mathematics knowledge of the calculation section
only by contacting with different types of questions, can we make all kinds of skillful thinking and methods to integrate, and the flexibility of calculation is the key to reflect the level of mathematical calculation ability.
4. virtual currency does not belong to electronic currency. There's a bit of a similarity. E-money is the electronic circulation of money, that is to say, the fundamental nature of e-money and money is the same. Virtual currency, from the beginning of q-coin game currency to the present bitcoin, bcbot and other digital currencies, belongs to virtual currency, which belongs to the activity of decentralization that has not been recognized, although digital currency also has some attributes of electronic currency.
5. Melting fire can mine and harvest herbs, but can't pick clocks and watches
Mining pick for clocks and watches: it has a chance to pick the chain gear of clocks and watches (it has a high chance to buy one) and won't wear the same machine
Mining pick for clocks and watches: it has a chance to pick the chain gear of clocks and watches (it has a high chance to buy one) and won't wear the same machine
6. Bitcoin extortion virus is basically sent with virus bound, so don't open files with uncertain sources, and back up important files in time. Although the anti-virus effect is not great, we should try our best to upgrade anti-virus and operating system patches in time. These measures are not only to prevent bitcoin virus, but also to prevent more viruses
7. What is bitcoin< p> bitcoin is a digital currency with a total amount of 21 million , which has the characteristics of decentralization, globalization and anonymity, just like the Internet
transferring bitcoin to the other end of the earth is as simple, low-cost and unlimited as sending e-mail
As a result, bitcoin is used in cross-border trade, payment, remittance and other fields
first: benefiting from the loose monetary policy of the Federal Reserve,
suffered from the COVID-19 pandemic this year. In order to solve the liquidity crisis and stimulate the economy, the Fed injected a large amount of liquidity into the US dollar, causing huge fluctuations in the global financial market, including the digital money market. P>
second: the occurrence of COVID-19, the hedging attribute of bitcoin
COVID-19 epidemic has swept across many countries in the world, and has also had a great impact on enterprises and investment circles. p>
in the Research Report of grayscale investment, it is mentioned that two thirds of the respondents who have invested in bitcoin in the past four months said that the new coronavirus epidemic affected their decision to invest in bitcoin
8. The devaluation of the currency will cause it to accelerate. Even if not devalued, as long as more and more people realize that bitcoin is a better currency, it will rise. Bitcoin can survive because it is not easy to use legal tender. For example, over issuance / devaluation / government intervention in exchange rate / foreign exchange control.
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