一、USDT是什么货币？
I. What is the currency of the USDT?
USDT是由泰达公司发行的稳定币，与美元1：1挂钩，可以理解为1USDT=1美元。
USDT is a stable currency issued by Tedda, pegged to US$ 1:1, which can be understood to be 1 USDT = US$ 1.
与常见的加密货币不同，USDT有三种类型。就像微信版本有安卓端、iOS端和WindowsPC端一样，USDT目前有USDT-Omni、USDT-ERC20、USDT-TRX20三种类型，这三种类型的币不能互相转账，就像安卓包只能安装在安卓手机一样。
Unlike common encrypted currencies, there are three types of USDT. As with the micro-mail versions of Andre End, iOS and WindowsPC, the USDT currently has three types of USDT-Omni, USDT-ERC20, USDT-TRX20, which cannot be transferred to each other, just as Andre Bob can only be installed on Andre's cell phone. 
二、为什么要发行USDT？
ii. Why release USDT?
原因有两点。
There are two reasons.
一是比特币与法币之间的兑换受政策影响较大。由于比特币与其他国家法币之间的交易常常受到各国政策影响，具有很大的不确定性。2015年2，泰达公司发行了第一批USDT，当时全球数字货币交易所巨头bitfinex率先宣布支持泰达币（USDT）交易，随后Poloniex也跟进，之后各大交易所也纷纷效仿，现在大家常见的像BTC/USDT交易对，正是当时出现的。
One is that the exchange between bitcoin and French currency is more influenced by the policy. Since Bitcoin’s transactions with other countries’ French currency are often influenced by national policies, there is considerable uncertainty.
二是以比特币为首的加密货币波动巨大，并不适合日常转账交易等。动辄10%以上的波动，可能比特币还没转过去，先缩水10%，因此，市场迫切需要一种稳定币，USDT因此诞生。
Second, the encoded currency, headed by bitcoin, is highly volatile and not suitable for day-to-day transfer transactions, etc. With more than 10 per cent of the volatility, it is likely that bitcoin has not yet been turned over and has shrunk by 10 per cent, so there is an urgent need for a stable currency in the market, and the USDT was born as a result.
三、USDT是用来干什么的？USDT主要用途有2种。
What are the USDTs for? There are two main uses of USDT.
（1）充当法币与比特币等数字货币之间的“桥梁”。目前市场上有7000多种数字货币，这些货币大部分不支持法币直接购买，而是支持与USDT之间的兑换。一般的流程是先将法币兑换为USDT，之后再兑换为数字货币。
(1) serves as a “bridge” between French and digital currencies such as Bitcoin. There are now more than 7,000 digital currencies on the market, most of which do not support direct purchase of French currency, but rather exchange with USDT.
USDT与法币间的兑换也称为“法币交易”，USDT与数字货币之间的交易也称为“币币交易”。
The exchange between USDT and French currency is also referred to as “transactions in French currency” and transactions between USDT and digital currency are also referred to as “transactions in currency”.
PS：法币是指具有国家背书的货币，如人民币，美元等。
PS: French currency means currency with national endorsement, such as the renminbi, the United States dollar, etc.
（2）转账。USDT是一种稳定币，不用担心价格大幅波动，因此比较适合转账。三种USDT的转账速度是不一样的，就像三种系统一样，用哪一个取决于个人喜好。
2) Transfers. USDT is a stable currency, not to worry about large price fluctuations, so it is more appropriate to transfer. The three USDT transfers are at different speeds, like the three systems, depending on personal preferences.
总体来看，基于TRX20的USDT转账速度快，免费，但安全性低，建议小额转账，其他类型见下表。
Overall, TRX20-based USDT transfers are fast and free of charge, but with low security, small transfers are recommended, other types being shown in the table below.
总结，币小宝官网显示，USDT目前市值排名第三，由于在稳定币里，USDT一家独大，为用户提供便利性的同时也形成了垄断，而USDT这种以中心化企业背书的加密货币，信用程度远远无法和以算法背书的比特币相比，更无法和以国家背书的人民币美元等法币相比，因此，币小宝建议，如果你要入币圈，减少持有稳定币USDT的时间，降低风险。
Summing up, the Network shows that the market value of the United States dollar is now ranked third, and that, because of the unique size of the United States dollar in a stable currency, which also creates a monopoly over user convenience, the United States dollar, an encrypted currency endorsed by a centralized enterprise, is far less creditable than bitcoin, which is backed by an arithmetic, and is less likely to compare to a national endorsement of the renminbi, such as the United States dollar, and therefore suggests that if you enter the currency circle, reduce the time and risk of holding a stable currency, USDT.
来源：金色财经
Source: Gold Economy.
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