I know that USDT isn't 100% backed and can't be used as a long-term store of value. I keep some USDT on my OWNR to use it for buying alts during bear markets, it's easier than buying crypto with a card.
Most people keep USDT in their own wallets for capital preparation during the bear market, so if you say USDT is not 100% supported and cannot be used as a long-term store of value, this is a little wrong in my opinion, indeed the USDT value often changes in price ends, but the bottom line will never go away, so USDT is still a very good place to use when it comes to storing long-term value.