Excellent virtual currency

1. The concept of bitcoin (BTC) was first proposed by Nakamoto on November 1, 2008, and was officially born on January 3, 2009
according to the idea of Nakamoto, the open source software is designed and released, and the P2P network on it is constructed. Bitcoin is a virtual encrypted digital currency in the form of P2P. Point to point transmission means a decentralized payment system
unlike all currencies, bitcoin does not rely on a specific monetary institution to issue. It is generated by a large number of calculations based on a specific algorithm
bitcoin economy uses the distributed database composed of many nodes in the whole P2P network to confirm and record all transactions, and uses the design of cryptography to ensure the security of all aspects of money circulation
this answer is provided by KangBo finance and economics. KangBo finance and economics focuses on the interpretation of financial hot events and the popularization of financial knowledge. It adheres to the profession and pursues fun. It is a financial content that people can understand and transmits financial value in a variety of vivid ways. I hope this answer will help you.

2.

Bitcoin is a kind of electronic currency / network virtual currency

bitcoin: also known as "bitcoin", is a kind of network virtual currency. Internet users can use bitcoin to buy some virtual goods, such as clothes, hats, equipment, etc. in online games. Internet users can also use bitcoin to buy real goods

on February 26, 2014, Joe Manchin, a Democratic senator from West Virginia, issued an open letter to a number of regulatory authorities of the US federal government, hoping that the relevant authorities would pay attention to the status quo of bitcoin's encouraging illegal activities and disrupting the financial order, and demanded that actions be taken as soon as possible to completely ban the electronic currency

from 12:00 noon on January 24, 2017, China's three major bitcoin platforms officially began to collect transaction fees

extended data:

currency features:

1, decentralization: bitcoin is the first distributed virtual currency, the whole network is composed of users, and there is no central bank. Decentralization is the guarantee of bitcoin's security and freedom

2, global circulation: bitcoin can be managed on any computer connected to the Internet. No matter where you are, anyone can dig, buy, sell or collect bitcoin

3, exclusive ownership: private key is needed to control bitcoin, which can be stored in any storage medium in isolation. No one can get it except the user himself

4, low transaction cost: bitcoin can be remitted free of charge, but a transaction fee of about 1 bitfen will be charged for each transaction to ensure faster transaction execution

5, no hidden cost: as a means of payment from a to B, bitcoin has no cumbersome limit of quota and proceres. If you know the other party's bitcoin address, you can pay

6, cross platform Mining: users can explore the computing power of different hardware on many platforms

advantages of bitcoin:

1, it is completely decentralized, without issuing institutions, it is impossible to manipulate the number of issues. Its distribution and circulation are realized through open-source P2P algorithm

2, anonymity, tax exemption and supervision free

3, robustness. Bitcoin is completely dependent on P2P network and has no distribution center, so it cannot be shut down externally. Bitcoin price may fluctuate and collapse, and many governments may declare it illegal, but bitcoin and its huge P2P network will not disappear

4, borderless and cross-border. Cross border remittance will go through layers of exchange control agencies, and the transaction records will be recorded by many parties. But if you trade with bitcoin, enter the digital address directly, click the mouse and wait for the P2P network to confirm the transaction, a lot of money will pass. It does not go through any regulatory agencies and will not leave any cross-border transaction records

5, Shanzhai people are difficult to survive. Because bitcoin algorithm is completely open source, anyone can download the source code, modify some parameters, recompile, and create a new P2P currency

but these counterfeit currencies are very fragile and vulnerable to 51% attacks. Any indivial or organization, as long as it controls 51% of the computing power of a P2P currency network, can manipulate transactions and currency value at will, which will be a devastating blow to P2P currency

many counterfeit coins die in this link. The bitcoin network is robust enough. If you want to control 51% of the computing power of the bitcoin network, the number of CPUs / GPUs required will be astronomical

the weakness of bitcoin

1, the fragility of trading platform. The bitcoin network is robust, but the bitcoin trading platform is fragile. Trading platform is usually a website, which will be attacked by hackers or shut down by competent authorities

2, the transaction confirmation time is long. When bitcoin wallet is first installed, it will consume a lot of time to download historical transaction data blocks. While bitcoin transaction, in order to confirm the accuracy of data, it will take some time to interact with P2P network, and the transaction will be completed only after the whole network is confirmed

3, the price fluctuates greatly. Due to the intervention of a large number of speculators, the price of bitcoin for cash fluctuates like a roller coaster. Making bitcoin more suitable for speculation rather than anonymous trading

4, the public did not understand the principle, and the traditional financial practitioners resisted. Active netizens understand the principle of P2P network and know that bitcoin has no legal person to manipulate and control

but the public doesn't understand, and many people can't even distinguish between bitcoin and q-coin“ "No issuer" is the advantage of bitcoin, but in the view of traditional financial practitioners, "no issuer" currency is worthless

3. This is just a counterfeit currency in the virtual currency, and it does not have the conditions for real Bi.
the conditions for a real currency are as follows:

1. Open source code,

2. Trading on international platforms

3. Decentralization and independent offline E-wallet,

4. There is a company's corporate account

5. It must be limited issue

only if all of the above five points are met

can it be regarded as a real currency, and all of these

can be found

, specific, physical, how, check

, private, chat,

4.

Solution: suppose there are x dimes and dimes (because there are an equal number of dimes and dimes in hobeni's Bank)

0.5x-0.1x = 12

0.4x = 12

x = 30

< P > A: there are 30 dimes and 30 dimes each

15 yuan for 30 dimes, 3 yuan for 30 dimes, 15-3 = 12 yuan

Setting the unknowns is one of the key steps in solving practical problems. According to the characteristics of practical problems, shooting the unknowns properly can make the process of solving problems simple and fast

in this question, the number of coins is set to X to get the answer quickly. In this question, the number of dimes and dimes is equal, so simply set it to X. If the number is different, for example, the total number of coins is 30, one of them can be set to 30-x

when it is difficult to set up the unknown sequence equation directly, the method of setting up the unknown number indirectly can be adopted, that is to say, not all of the unknowns are set, and some quantity other than the quantity required in the question needs to be set as the unknown element, so as to find out the equivalent relationship in line with the meaning of the question

5. RMB 1 = US $0.1546
US $1 = RMB 6.4665
US $1500 = RMB 9702.458

6. In the past year, many parking lots, scenic spots, ticket agencies and supermarkets have been punished by the state for refusing to accept RMB, which is extremely wrong.

7. For a Book of 35 yuan, you need to pay 4 notes of 10 yuan,
10 yuan × 4-35＝5，5 ÷ 5 = 1
retrieve 1 5 yuan note.

8. The answer is 1, because the book is 35 yuan, she pays 10 yuan, so the most she can pay is 4, that is 40 yuan, 40-35 = 5, so the answer is 5 yuan