USD Tether is a Bitfinex issued ERC-20 token which is claimed to be backed by dollar at 1:1 ratio. There are controversial opinions about this and some say it's a scam.
Do you trust USDT or believe it might be a scam?
Nearly 90% of exchanges in the world use USDT as their main method of trading. If we don't believe it, what about the other 90% who believe in USDT. I think we no longer need to question USDT trusts.