Yes, I believe in USDT, but it takes a long time for profit, basically, USDT is a trading coin in the crypto market. Because of its stability fluctuating daily. If you want to be a trader in the crypto market, you can trust in USDT.
Personally I have no negative thoughts about USDT. I do not consider it as a investment or something for trading and profit. But I use it as a link between cryptocurrencies and ordinary national currencies. Nowadays lots of DeFi projects also use it or accept for transactions. So personally for me USDT is a means for some operations, but nothing more. And I think it works perfectly, I have never faced problems using it.