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?
Many people trust Tether and trade with it. Of course it looks stable but there are a lot of bad rumors around this token. When I trade I try not to use it, I always trade using btc, bitcoin in the last turn will turn out to be a Scam.