If you're from the United States, I suggest holding real dollars instead of holding USDT. It's been said from time to time that USDT might not really be 100% backed 1:1 as they've claimed in the past. Hence, there's a risk into holding USDT as a $1 USDT price isn't 100% guaranteed in the long term.

But anyway like OmegaStarScream said, Trezor supports it, along with Ledger. So if you're holding significant amounts, definitely go with that instead.