USDT is on a major exchange and that means USDT is trusted by everyone so it can't be a scam. besides USDT is widely used by everyone to secure assets when the market is red.
Usdt is also listed on non major exchange . It's hard if will based on exchange to say that a coin is trusted or not . Usdt is not a pure breed of crypto and there are people that won't trust that kind of coins but for some it's not really a big deal , as long as we can see them being paired on crypto and most feedbacks are okay , we don't doubt on them .
Many simillar coins that have same concept as usdt but as of now usdt ranked first .
Agree! There is no certain way to prove a coin is trustworthy or not in the cryptocurrency market. If we have doubts, we should have doubts about all of the coins because there is a certain rate of risks exist. In my opinion, USDT is not completely trustworthy because we can't verify the total supply of fiat money that back USDT. However, as long as USDT provides benefits and have good feedbacks, we can skip the doubts for a bit!