If you have to score, it depends on the time sequence:

The first level: Bitcoin, the uncrowned king.

The second level: Litecoin, dogecoin and other counterfeit money.

The third level: decent and ethereum, the main application.

1. digital currency refers to the digitization of currency. Digitization is not equal to scanning. It's like a digital signature. Digital signature is not scanning your signature into a digital image, or obtaining your signature with a touch screen, let alone your signature.

Digital currency is often mistaken for virtual currency. But virtual currency refers to unreal currency. For example, when you play Three Kingdoms (games) or go sailing, you have money, and that money is virtual. Of course, those virtual currencies will also have their real value. For example, if you buy her/his account from another player, you can get all the virtual assets of that player, and then it will be much easier for you to continue playing. Virtual currency is not necessarily digital. For example, children play games with pebbles as virtual currency.

Second, digital gold currency is issued by many suppliers. Each competitive supplier issues an independent digital gold currency, which is basically named after their company name. At present, the digital gold currencies in circulation are:

1, e-Gold-the first digital gold currency supplier, established in 1996.

2. Electronic Gold and Silver -2000 was established

3.E-Dinar was founded in 2000.

4.GoldMoney-200 1 was founded in +0 year.

5. 1MDC-200 1 holds.

6.pecunix- founded in 2002

7. Crown Gold-Established in 2002.

8. Freedom Reserve-Established in 2002.

9.e-gold and Liberty Reserve are the most popular suppliers of digital gold currency, with the largest number of users. In terms of total gold reserves, GoldMoney is a leading supplier (May 2006).

Third, currency risk.

Digital gold currency is a kind of physical currency, and its deposits are measured in gold instead of illegal currency. Therefore, the fluctuation of purchasing power of digital gold currency is related to the price of gold.

If the price of gold rises, it will become more valuable; If the price of gold falls, it will depreciate. Since there are no specific financial regulations to supervise digital gold currency suppliers, they operate in a self-regulatory manner. The supplier of digital gold currency is not a bank, so banking regulations are not applicable.

However, the Global digital currency Association, founded in 2002, is a non-profit association for online currency operation, exchange, merchants and users. The association monitors users' reports and grades the credibility of money changers, and the rating operation is confirmed according to the facts reported by users.