The disadvantages of bitcoin do not include

5. Bitcoin is an electronic money payment system based on the global network
bitcoin is an electronic money system with a fixed total amount, which is established on the global decentralized network system and issued without the participation of central banks and third-party institutions. Bitcoin has the characteristics of payment system and currency at the same time. Global network nodes are maintaining the bitcoin network all day<

English: bitcoin currency symbol: abbreviation: BTC or XBT

Introction to bitcoin by wiki
different from traditional currency, bitcoin's operation mechanism does not rely on the support or credit guarantee of central bank, government and enterprise, but on the network agreement reached with seed files in the network, which is a decentralized and self-improvement monetary system, Theoretically, it ensures that no one, institution or government can control the total amount of bitcoin or create inflation. Its total amount of money graally increased at the designed rate, and the increase rate graally slowed down, and finally reached the limit of 21 million in 2140<

Introction to bitcoin in network
bitcoin is based on a set of cipher codes and generated by complex algorithms. This rule is not interfered by any indivial or organization and is decentralized; Anyone can download and run the bitcoin client to participate in the proction of bitcoin; Bitcoin uses electronic signature to realize circulation, and checks repeated consumption through P2P distributed network. The generation and consumption of each bitcoin will be recorded through the P2P distributed network and informed to the whole network. There is no possibility of forgery. Bitcoin does not rely on specific currency institutions to issue, it is generated through a large number of calculations of specific algorithms. Bitcoin economy uses a distributed database composed of many nodes in the whole P2P network to confirm and record all transactions. The decentralized nature and algorithm of P2P can ensure that it is impossible to artificially manipulate the value of bitcoin through mass proction<

Introction to bitcoin in interactive network
bitcoin is an electronic currency proced by open source P2P software. Bitcoin does not rely on specific currency institutions to issue, it is generated through a large number of calculations of specific algorithms. Bitcoin economy uses a distributed database composed of many nodes in the whole P2P network to confirm and record all transactions. The decentralized nature and algorithm of P2P can ensure that it is impossible to artificially manipulate the value of bitcoin through mass proction<

the difference between bitcoin and bitcoin
it should be noted that

in English, the words bitcoin and bitcoin represent two concepts of payment network and monetary unit

bitcoin starting with capital B represents bitcoin network system or bitcoin network protocol, which is a payment system based on decentralized network

you can simply understand bitcoin as a public accounting system built on the Internet and not manipulated by any third party. Bitcoin, which starts with lowercase B, refers to the digital currency (e-money, e-cash, cryptocurrency) built on bitcoin network. Bitcoin is the payment accounting unit built in bitcoin payment system. We call bitcoin the network system that proces bitcoin<

in Chinese, bitcoin and bitcoin are both called bitcoin without distinction in many places

its main features are as follows:
1. Decentralization

bitcoin is the first distributed virtual currency, and the whole network is composed of users without a central bank. Decentralization is the guarantee of bitcoin's security and freedom< 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 required 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 in the end, a small transaction fee 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. Bitcoin is not completely anonymous
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learning bitcoin studybtc

it will take some time to protect privacy when using bitcoin. All bitcoin transactions are publicly and permanently stored in the network, which means that anyone can view the balance and transaction records in any bitcoin address. Unless the bitcoin holder discloses personal information ring the transaction, the bitcoin address will not be associated with the real identity of the bitcoin holder. This is why it is recommended that bitcoin holders use multiple bitcoin addresses; In fact, you should create a new address each time to receive bitcoin. This is especially important when using bitcoin in public places, such as on websites. In addition, you can also consider using tools like tor to hide your IP address from being recorded. Learning bitcoin

7. Bitcoin is still experimental

bitcoin is an experimental new currency in active development. Although its experimentality is diminishing with its increasing usage, remember that bitcoin is a new invention, exploring ideas that have never been tried before, so no one can predict the future of bitcoin.

6. Bitcoin (bitcoin: bitcoin) was originally a kind of network virtual currency, similar to Tencent's q-coin, but it has been able to buy real-life goods. It is characterized by decentralization, anonymity, and can only be used in the digital world. It does not belong to any country or financial institution, and is not subject to geographical restrictions. It can be exchanged anywhere in the world. Therefore, it is used as a money laundering tool by some criminals. In 2013, the U.S. government recognized the legal status of bitcoin, making the price of bitcoin soar. In China, on November 19, 2013, a bitcoin was equivalent to 6989 yuan

in 2009, Nakamoto designed a kind of digital currency, namely bitcoin. The booming bitcoin market has gone up and down, and the identity of its founder "Nakamoto" has always been a mystery. Rumors about "the father of bitcoin" involve from the US National Security Agency to financial experts, and also give bitcoin a mysterious aura

on January 7, 2014, Taobao announced that it would ban the sale of Internet virtual currencies such as bitcoin and lightcoin from January 14. On February 26, 2014, Democratic Senator Joe Manchin of West Virginia issued an open letter to a number of regulatory authorities of the federal government of the United States, hoping that relevant institutions would pay attention to the status quo of bitcoin encouraging illegal activities and disrupting the financial order, and demanded that actions be taken as soon as possible to completely ban the electronic currency. On January 11, 2017), the Shanghai headquarters of the people's Bank of China and the Shanghai Municipal Finance Office carried out on-site inspection of bitcoin China, focusing on whether the enterprise carried out credit, payment, exchange and other related businesses without permission or license; Implementation of anti money laundering system; Fund security risks, etc. On January 12, 2017, the business management department of the people's Bank of China also entered the trading platforms such as "fire coin net" and "currency bank" in Beijing
on May 12, 2017, a global outbreak of bitcoin virus madly attacked public and commercial systems! More than 40 hospitals across the UK have been widely hacked, leaving the NHS in chaos. The campus networks of many colleges and universities in China were also occupied. Nearly 74 countries in the world have been seriously attacked
currency characteristics

Decentralization: bitcoin is the first distributed virtual currency, and the whole network is composed of users without a central bank. Decentralization is the guarantee of bitcoin's security and freedom
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
exclusive ownership: the private key is required to manipulate bitcoin, which can be stored in any storage medium in isolation. No one can get it except the user himself
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
no hidden cost: as a means of payment from a to B, bitcoin has no cumbersome quota and proceres. If you know the other party's bitcoin address, you can pay
cross platform Mining: users can explore the computing power of different hardware on many platforms
advantages
complete decentralization, without issuing institutions, it is impossible to manipulate the number of issues. Its distribution and circulation are realized through open-source P2P algorithm. Anonymity, tax exemption and supervision free. 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

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. It's hard for a cat 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 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 Shanzhai 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
disadvantages
vulnerability 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. Transaction confirmation takes a long time. 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

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. 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 tell the difference 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.

7. Different stocks are going up because of their good performance, that is to say, the strength of the company is improving and becoming more and more valuable. Virtual currency is going up because it is as rare as stamps. One hundred sets of this one is not available, so it's expensive. But the question is, does anyone accept the offer? In case there are many virtual currencies coming out tomorrow, XX currency, XXX currency, that is, the number of bitcoins is certain It's not like gold. There's so much gold. But virtual currency is virtual code. It says that writing can write gold. Can you make it more? So virtual currency is not the mainstream, but the most auxiliary thing. The value is not too high. Don't think that people are good when they buy. People follow too much. In the past, Auntie was crazy when she bought gold. Now why is she rational Money ah, stocks, migrant workers have bought stocks, and now how not to buy or lose money, real estate is also the same, and so many years after the collapse will be rational

8. The biggest difference: bitcoin is a proct of liberalism, and the real currency is supported by national credit
advantages: convenient cross-border payment and constant quantity. Disadvantages: the price is unstable. It rises and falls rapidly.

9. The "defects" of bitcoin as an alternative currency
the concept of bitcoin has a strong inspiration for the existing currency issuance and circulation system, but bitcoin itself can not replace legal currency, not only because of the government's permission, but also because of its own internal restrictions
transaction processing capacity limit. Each block size is limited to 1m, and each transaction is about 250 bytes, so each block can hold up to 4000 transactions. Since the average generation time of each recognized block is 10 minutes, it means that only 7 transactions can be processed per second
with the popularity of blockchain transactions, many transactions have to wait in line to be written into bitcoin blockchain. In turn, the limitation of transaction processing capacity will affect the application scope and scenarios of bitcoin as a digital currency
the underlying cryptographic algorithm may be broken. The hash function selected by bitcoin has collision resistance (if two values cannot be found, X and y, X is not equal to y, and H (x) = H (y), it is said that the hash function h has collision resistance), but there is no hash function in the world with real anti-collision characteristics, but the probability of being broken is very low. The problem is that once it is broken, it means that the security of the whole bitcoin will be fundamentally threatened. By then, bitcoin may be worthless. In fact, this worry alone will affect people's confidence in bitcoin
in addition, the total amount, segmentation and blockchain reward structure of bitcoin will become restrictive conditions at a certain stage of bitcoin development. To solve these problems, we need to release a new basic version. In the distributed architecture, we can not ensure that all nodes update the latest protocol, and the release of the new version will bring the problem of bifurcation
of course, through the introction of strict verification mechanism, the underlying protocol can be updated by tolerating soft forks for a period of time, which will not have a fundamental impact on the value of special currency, but it is not competent to replace legal currency
at present, compared with the positioning of special currency, the consensus reached in the instry is "digital gold" or "quasi digital currency", rather than digital currency. Through the regulation and supervision of the third-party intermediary platform, effective transactions can be concentrated in the field, which can become a new type of investable asset. And its "quasi digital currency" feature is more of the digital evolution of legal money to provide ideas and technical implications, how to talk about substitution
finally, there has been controversy about the anonymity of bitcoin and the risk of money laundering. Indeed, it is one of the core concepts of the bitcoin system not to require everyone to join with their real identities, but bitcoin transactions can not be truly anonymous, and different transactions made by a user with different identities can be eventually traced; The transactions made by third-party service organizations such as bitcoin wallet and exchange are subject to the anti money laundering management of regulatory agencies. In fact, they are all real name transactions.