If the OP is worried about the future of USDT, he can always opt to other stablecoin like DAI.
It is not new that there are bad news regarding the existence of USDT.
The first time that I got hesitant with this stable coin was when they admitted not to be fully backed by USD assets.
But I am still using it only for conversion purposes in exchanges as they are available in most trading platforms, not for long term investments.
Maybe, for day to day trading, you can use it. But long-term holding? That's when you need to really think about.