区块链数字币合法吗?,区块链数字币行业有多少鲸鱼?

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1. What is erc20?

ERC20 is a token standard on the Ethereum blockchain. It is widely used in crowdfunding of blockchain projects. It is a digital currency that can be used for transactions, payments, investments and many other purposes. This article will introduce in detail the definition, characteristics, advantages and disadvantages, applications and development prospects of ERC20.

1. What is ERC20

2. Characteristics of ERC20

3. Advantages of ERC20

4.ERC20 Disadvantages

5. Applications of ERC20

6. Development prospects of ERC20

1. What is ERC20

ERC20 is a token standard on the Ethereum blockchain. It is a digital currency that can be used for transactions, payments, investments and many other purposes. ERC20 is a standard based on smart contracts. It is widely used in crowdfunding of blockchain projects and is a standard for Ethereum tokens. ERC20 tokens are generated through Ethereum smart contracts, and they can be transferred, paid, and traded on the Ethereum blockchain.

2. Characteristics of ERC20

ERC20 tokens have many unique characteristics, the most important of which are programmability, tradability, traceability and auditability . It can be programmed for more functionality, can conduct transactions on the Ethereum blockchain, can track the movement of tokens, and can be audited to ensure the safety of funds.

3. Advantages of ERC20

The advantage of ERC20 token is that it can support crowdfunding projects on the Ethereum blockchain, and these crowdfunding projects can use ERC20 Tokens for financing. Transactions for ERC20 tokens are also fast and can be completed within seconds. Additionally, transaction costs for ERC20 tokens are also very low, with Bitcoin’s transaction costs being much lower.

4. Disadvantages of ERC20

The disadvantage of ERC20 tokens is that it cannot support cross-chain transactions and therefore can only be traded on the Ethereum blockchain. Additionally, ERC20 tokens cannot be used for investments as they cannot support investment activities.

5. Applications of ERC20

ERC20 tokens can be used for a variety of applications, including crowdfunding, payment, investment, trading, etc. It can be used to support new blockchain projects, and can also be used to support the transactions of new digital currencies and digital assets. In addition, ERC20 tokens can also be used to implement distributed applications (DApps) and implement decentralized financial services.

6. The development prospects of ERC20

The development prospects of ERC20 tokens are very optimistic because they can support crowdfunding of blockchain projects and the trading of new digital currencies and digital assets. In addition, ERC20 tokens can also be used to implement distributed applications (DApps) and implement decentralized financial services. With the development of blockchain technology, ERC20 tokens will become more and more important, they will become an important part of blockchain projects, and Sock Holder will make an important contribution to the development of blockchain technology.

ERC20 is a token standard on the Ethereum blockchain. It has the characteristics of programmability, tradability, traceability and auditability, and can be used by the public. It can be used for various purposes such as financing, payment, investment, and transaction, and has good development prospects.

2. What is blockchain and what is digital currency

Blockchain is an important concept of Bitcoin and is essentially a decentralized database.
At the same time, as the underlying technology of Bitcoin, it is a series of data blocks generated using cryptographic methods. Each data block contains a batch of Bitcoin network transaction information, which is used to verify the validity of its information. (anti-counterfeiting) and generate the next block. Digital currency is an unregulated, digital currency that is usually issued and managed by developers and accepted and used by members of a specific virtual community. The European Banking Authority defines virtual currency as: a digital representation of value that is not issued by a central bank or authority and is not linked to a legal currency, but which, because it is accepted by the public, can be used as a means of payment or can be transferred, stored or traded electronically. .
The content of this article comes from: China Law Publishing House's "Law Life Common Sense Series"

3. Top 20 Digital Currencies

1. BTC-Bitcoin
The market value of Bitcoin is US$441.685 billion, accounting for 71.12% of the total global market value. Bitcoin is almost the only way for newcomers in the currency circle. With its huge market value advantage, it is also very suitable for investment by some institutional investors. For newcomers, the most recommended investment currency is Bitcoin. After all, the rise and fall of the entire currency circle depends on the performance of Bitcoin. If you are familiar with investing in Bitcoin, you will be more comfortable doing altcoins later.
2.ETH-Ethereum
The market value of Ethereum is US$69.657 billion, accounting for 11.22% of the total global market value. Currently, Ethereum ranks second in market value. It must have its own value and can be used to create decentralized Programs, autonomous organizations and smart contracts, the potential applications of smart contracts are many. Bloomberg Businessweek calls it "software that is shared by everyone but cannot be tampered with." More advanced software makes it possible to create web stores with Ethereum.
3.USDT-Tether
The market value of Tether is US$20.11 billion, accounting for 3.24% of the total global market value. Tether has the advantage of being the first to move, and currently ranks fifth in market value. Since it is a stable currency, its volatility is generally low. Big, not suitable for small investors, plus no matter whatEverything may face bankruptcy. The bank that opens an account with the company may also go bankrupt, and there may also be risks of donations running away, etc.
4. The currency price has always been relatively stable, with many fans and a very active community. It is listed on 201 exchanges and has a very wide trading depth. The stable currency price shows that there are many users and a high consensus. It is possible to support all virtual digital currencies in the future. I believe the future will be better. .
5.LTC-Litecoin
The market value of Litecoin is US$7.003 billion, accounting for 1.13% of the total global market value. The creator of Litecoin, Li Qiwei, graduated from MIT and was a former employee of Google. He designed it in 2011 of Litecoin. The total amount is mentioned above as 84 million coins, and 63.7 million coins have been mined so far. The maximum unit price is 2,000 yuan, and the current price is about 410 yuan.
Extended information
1.BCH-Bitcash
The market value of Bitcoin Cash is US$5.483 billion, accounting for 0.88% of the total global market value. BCH is one of the forked coins of Bitcoin, and it expands on demand. The biggest feature of the large-block ecological development route is that the transfer fee is very low, and among the POW currencies, the computing power is the safest one except Bitcoin.
2.BNB-Binance Coin
Binance Coin has a market capitalization of US$4.854 billion, accounting for 0.88% of the total global market capitalization. Binance is the largest leading platform, and its platform currency BNB naturally attracts a lot of attention. Spend. At the same time, although the platform currency model was not pioneered by Binance, it was indeed promoted by Binance and established its own first-mover advantage.
3.LINK
LINK has a market capitalization of US$4.694 billion, accounting for 0.75% of the total global market capitalization. LINK is an ERC20 standardized token based on the Ethereum blockchain and is used to pay Chainlink node operators to obtain data from off-chain data. Retrieve data from the database, format the data into a blockchain-readable format, perform off-chain calculations, and ensure uptime. Chainlink tokens are used as part of running nodes to protect against bad actors.
4.DOT-Polkadot
The market value of Polkadot is US$4.493 billion, accounting for 0.78% of the total global market value. The Polkadot community voted to approve the 100-fold split of DOT. This is DOT that has been split 100 times. Polkadot will realize a completely decentralized Internet where users have full control.
5.ADA-ADA Coin
The market value of ADA Coin is US$3.819 billion, accounting for 1.01% of the total global market value. ADA is known as the Ethereum of Europe, and its market value is also very consistent with its status in Europe. The current total market value ranking is No. 10.

4. What is the relationship between blockchain and digital currency

Blockchain refers to a series of digital currenciesA chain formed by connecting data blocks (i.e. blocks), the connection method is: the N+1th block contains the hash value of the Nth block. Moreover, such a chain of data blocks is simultaneously stored and maintained by a widely distributed and huge number of server nodes. Each server node has a complete copy of the blockchain. Digital currency is another form of existence and circulation of legal currency. Compared with the banknotes and coins currently in circulation, digital currency exists in a digital way. The legal existence of digital currency is legal and is based on blockchain technology. Blockchain is the underlying technology for digital currency issuance. This is also the most direct relationship between the two. They can exist independently of each other. The content of this article comes from: China Law Press "Financial Code of the People's Republic of China: Application Edition"

5. How much is 200,000 digital currency TOKEN worth in RMB

Token is just the English word for token. Also called a token, it generally refers to a digital currency issued based on blockchain technology. You said 200,000 tokens, but you did not specify the specific token type, such as Bitcoin, Ethereum, EOS, or Monero, etc. , one Bitcoin is now about 24,300 yuan, and one Ethereum is about 800 yuan, so it depends on the specific token

6. The relationship between digital currency and blockchain

1. Blockchain and digital currency complement each other and are inseparable. Blockchain is one of the means of digital currency circulation.
2. Blockchain is the theoretical basis of digital currency. Digital currency is established on the basis of blockchain technology. Blockchain has certain guarantees for the security of digital currency. At the same time, digital currency is a block chain. The most successful application of chain technology.
Extended information: 1. Digital currency is an unregulated, digital currency, usually issued and managed by developers, and accepted and used by members of specific virtual communities. The European Banking Authority defines virtual currency as: a digital representation of value that is not issued by a central bank or authority and is not linked to a legal currency, but which, because it is accepted by the public, can be used as a means of payment or can be transferred, stored or traded electronically. .
2. Digital currency can be considered as a virtual currency based on node network and digital encryption algorithm. The core characteristics of digital currency mainly reflect three aspects: ① Because it comes from certain open algorithms, digital currency has no issuing entity, so no person or institution can control its issuance; ② Since the number of algorithm solutions is determined, the digital currency The total amount of currency is fixed, which fundamentally eliminates the possibility of inflation caused by excessive issuance of virtual currency; ③ Since the transaction process requires the approval of each node in the network, the transaction process of digital currency is safe enough.
3. The blockchain shared value system was first imitated by many cryptocurrencies, and improvements were made in proof of work and algorithms, such as the use of proof of equity and SCrypt algorithms. Subsequently, the blockchain ecosystem continued to evolve around the world, with the emergence of initial coin offerings (ICO); smart contract blockchain Ethereum; "An asset tokenized sharing economy that emphasizes light ownership and heavy use rights; and a blockchain country. People are using this shared value system to develop decentralized computer programs in all walks of life and build decentralized autonomous organizations around the world. and decentralized autonomous communities.

7. What does it mean to choose ERC20 to withdraw coins?

Selecting ERC20 to withdraw coins means that the user chooses the ERC20 protocol when withdrawing coins, then the corresponding When filling in the withdrawal address, you must write the Ethereum address based on the ERC20 protocol. The withdrawal speed of the ERC20 protocol is relatively fast, and the fee type paid is ETH. Most trading venues support deposits and withdrawals, and the withdrawal limit is low. , supports smart contracts, and on-chain transaction queries are more convenient. The security and transfer speed of ERC20-USDT are acceptable, and it is suitable for frequent transactions in the digital currency market. If users often do short-term transactions, it is recommended to give priority to ERC20-USDT.
Expanded information: 1. When depositing and withdrawing USDT, investors find that there are three different chain types to choose from, namely ERC20, TRC20 and Omni. However, most investors are stuck here and cannot choose between the three. I don’t know how to choose, and I don’t even know what these three are. To put it simply, ERC20 is the chain type of the Ethereum blockchain, TRC20 is the chain type of the Tron blockchain, and Omni is the chain type of the Bitcoin blockchain network. Chain type.
2. In 2014, USDT was born on the Bitcoin network and was officially launched on several major exchanges in February 2015. Before 2018, there was only one transfer path for USDT, which was based on the Bitcoin network Omni-USDT. Omni-USDT is stored on a Bitcoin address, so every time you transfer, you need to pay Bitcoin as a miner fee. Omni-USDT is on the chain of the Bitcoin network, and the cost of hacking is very high, so The asset is relatively secure. However, its transaction speed is very slow and cannot meet the needs of today's encryption trading market. However, many large transactions will still tend to Omni-USDT. The security and transfer speed of ERC20-USDT are in the middle. Suitable for digital Frequent transactions in the currency market. If you often do short-term transactions, you can choose ERC20-USDT first.
3. In 2018, the Ethereum network became popular, and blockchain applications were also widely used, and ERC20-USDT appeared. And Like Omni-USDT, you also need to pay absenteeism fees when using ERC20-USDT, but the transfer speed has been significantly improved. Due to its good security and fast transfer speed, ERC20-USDT is widely accepted by the market, and TEDA, the issuer of USDT, has also begun to support it. The more efficient Ethereum ERC20. Due to its relatively high comprehensive index, it is more popular on mainstream trading platforms.

8. What is the difference between trc20 and erc20

USDT-TRC20 address It starts with T, USDT-ERC20 address starts with 0x; USDT-ERC20 (Ethereum) and USDT-TRC20 (Tron) use different protocols and belong to different blockchain networks; USDT-ERC20 is more secure, USDT-TRC20 is more secure relatively low. USDT is Tether USD, a token based on the stable value currency U.S. dollar
(USD) launched by Tether. 1USDT=1 U.S. dollar. Users can use USDT and USD for 1:1 exchange at any time. Blockchain is a shared database. The data or information stored in it has the characteristics of "unforgeable", "full traces", "traceable", "open and transparent" and "collectively maintained". Based on these characteristics, blockchain originated from Bitcoin.
The concept of Bitcoin (Bitcoin) was first proposed by Satoshi Nakamoto on November 1, 2008, and was officially born on January 3, 2009. The total number is 21 million, December 17, 2017 On November 13, 2020, Bitcoin reached an all-time high of US$19,850, and then fell back. On November 13, 2020, the price of Bitcoin once again exceeded US$16,000. Litecoin (LTC) was inspired by Bitcoin (BitCoin, BTC) An improved version of digital currency, designed and implemented by a programmer who once worked at Google, was released and launched on November 9, 2011. Litecoin and Bitcoin technically have the same implementation principle, but the creation and transfer of Litecoin Based on an open source encryption protocol and not managed by any central agency.
In terms of currency security, Litecoin’s development process and payment process are more secure than ordinary currencies. During the development process, it cannot be Counterfeiting, Litecoin is a series of complex solving codes that obtain currency through mining rather than printing, which fundamentally eliminates the generation of "counterfeit coins", which is one of its advantages. Litecoin uses addresses during the payment process Transacting with private keys is like passwords and keys. There are hundreds of millions of possible combinations of addresses and private keys, which are difficult to crack and improve security.
But even for decentralized payment systems, the Litecoin system It is still threatened by the "51% Attack", which means using more than 51% of the computing power of the entire network to build a regional chain and compete with the entire network. Once successful, it will be able to control Litecoin, which will have serious consequences. Although "51% The probability of "%Attack" happening is very small, but for a public virtual currency system, such a vulnerability should not be tolerated.

9. What is a digital currency blockchain

< p>1. Blockchain is a ledger that records digital currency transactions
Take Bitcoin as an example. It does not have a physical form, but exists in a dedicated ledger. All Bitcoin transactions are recorded in the ledger, and through transaction records We can calculate the number of Bitcoins owned by each user. If a person owns Bitcoins, it means that the corresponding number can be found in the ledger.His related transaction records.
The ledger mentioned here is a piece of software, which we can download from the official Bitcoin website, and the underlying technology used in this software is the blockchain. To facilitate understanding, we usually say that the blockchain is the ledger.
The reason why blockchain is used as the underlying technology of the ledger is to achieve the decentralization of digital currency. It can be said that the starting point for a series of problems encountered by digital currencies and the solutions provided comes from decentralization.
2. Blockchain is a technology that ensures the safe use of digital currencies. Everyone knows that blockchain technology has two major characteristics: encryption and non-tamperability, which can reduce the probability of errors during the use of digital currencies. reduced to 0. Since digital currencies have higher requirements for encryption, blockchain technology must be used to support them. Currently, not only many industries in our country are using blockchain technology, but many foreign countries are also actively using blockchain technology. Blockchain technology.
[Extended information]
Blockchain is the underlying technology of digital currency, and Bitcoin is the first successful application of blockchain.. To understand this problem, we must first recognize the facts: not all blockchains require Issuing digital currency, currently our country strongly supports "coinless blockchain". Generally speaking, public blockchain, that is, public chain, needs to issue tokens as "rewards" to motivate users and maintain system operation, while ordinary blockchain , often called a consortium chain, can or cannot be issued. Private blockchains are mostly used for company internal audits and generally do not need to issue coins. The following is a detailed explanation of the differences between the three blockchains:
1. Public block Chain: A blockchain in which anyone in the world can read and send transactions for validity confirmation, and anyone can participate in its consensus process. Bitcoin and Ethereum are typical applications of public blockchains. Public blockchains are a global Distributed blockchain, blockchain data is open, user participation is high, and it is easy to produce network effects, easy to apply and promote. Therefore, this kind of blockchain operation relies heavily on the incentive mechanism, Bitcoin Tokens such as Ethereum and Ethereum are used as "rewards" for incentives, so public chains need to issue tokens to maintain their own development and ecology.
2. Community Blockchain (Alliance Chain): It means that the participation of nodes in the blockchain is selected in advance. There are usually good network connections and other cooperative relationships between nodes. The data on the blockchain can be open It can also be internal. For partial distribution, we can regard it as "partial decentralization". Each alliance in the chain has its own centralized management. For example, R3CEV of more than 40 banks is a typical alliance chain. Chains usually do not require a lot of money, but there are also individual alliance chains that choose to send money to motivate members within the alliance to contribute, so there are no restrictions on the chain.
3. Private blockchain: refers to a node with a limited scope of participation, such as a specific organization’s own users, strict permission management for data access and use.. Write permissions in a completely private blockchain Only in the hands of participants, read accessIt can be open to the outside world or restricted to any extent. It is currently mainly used for internal audit work of the company. Therefore, the private chain does not need to issue currency and does not have the characteristics of decentralization. It is a centralized management mechanism.