out there, stablecoin is not only USDT, there are several similar stablecoins such as USDC, TUSD, BUSD, and many other stablecoins. so if USDT is depegged from the US dollar, what can be said, that is the risk of stablecoin that it can be depegged at any time. there must be concerns among investors, but it should not have a severe effect on bitcoin, maybe a slight decline in the market, but it should not last long. bitcoin is stronger now and it does not depend on altcoins.
I think USDT is not algorithmic based like the Tera and others which is the real ones that can depeg. I only heard that USDT is facing some legal issues lately but I think they will resolved it, like what it did on their other issues in the past. If you are one of those who have a USDT, and then it got in trouble, obviously you will complain. But yeah, BTC is also a different breed, that it may hardly get affected by the turmoil caused by this USDT.
so if USDT is depegged from the US dollar, what can be said, that is the risk of stablecoin that it can be depegged at any time.
I think you are saying that the problem of USDT in case, are going to get shared with the other stablecoins? But no, it doesn't work like that, since each stablecoin company is different from the other.