Before understanding about USDT you needed to understand aboutUSD USD is the fiat money that we all stored in our bank account and if we putt Tether then it became USDT that is the world third biggest cryptocurrency we mostly used for the trading and exchanging
Why USDT IS SAFE USDT is backed up by UNITED STATE DOLLAR (USD) it is a stable Crypto currency it had fully transparency and everything is managed daily everything is locked
so that's the don't reason people believe that USDT is safe