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?
Some believed that USDT is a scam because of the accusation on bitfinex in mid 2018 by the New York Attorney general of using Tether funds to cover up 850 Million dollars in funds that went missing , there are other allegations too like price manipulation but I guess crypto space is full of manipulations itself