Level up your DeFi knowledge and subscribe to our newsletter! The Problem Centralized stablecoins have many unknown risks. If you are holding a significant amount of Tether in your portfolio, you probably know what we are talking about. By holding centralized stablecoins, you are trusting a single institution to not mess with your money. In the case of Tether, you trust Bitfinex, that they have an equivalent amount of USD for every issued USDT in their bank account. The problem is: nobody can verify it.