Tether, abbreviated USDT, is a digital currency that protects you from severe market fluctuations at a fixed price and allows you to transfer dollars digitally. If you are looking to invest or trade digital currencies, you have probably heard of Tetra. In this article, we will answer the questions of what Tetra is, how it works and why its price is always constant. In this article, you will also get acquainted with the best wallets of this digital currency and how to buy it. Be with Digital Currency.