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?
indeed there is a lot of controversy behind it, so many people think usdt is a scam, but consistently over the years they don't seem to mess around in making this stablecoin. for now I believe it's not a scam.