I've been analyzing some of the most popular stablecoins currently, and I don't trust any. Nevertheless, I still think they are pretty useful and necessary currently, so I've chosen USDT as the most trustworthy for me. Why? Because of the alternatives:

1- DAI: looks to me just as wrapped USDC with extra steps and risky factors (i.e. most of the collateral backing it right now is indeed a centralized stablecoin...so if USDC collapses it will very likely kill it...and it has a lot of extra complexity in his inner workings that naturally add extra risks...So why the hell just not use USDC?)
2- RAI: It looks to me that decentralized stable coins are experiments right now, which are very dangerous to get involved in, have very complex mechanisms to wrap my head on, and depend on economics principles that I´m not certain they will really work. This coin sounds interesting and is backed 100% by ether, but when I looked on youtube for an interview with the creator, he had difficulties even clearly explaining its workings and principles in my opinion. I support this kind of experiment nevertheless, just don´t trust their principles until they have a lot of maturity in the market.
3- USDC: It seems very connected to the US financial system and government to me, so more easily exposed to regulatory risks, wallet bans, etc. Which is something I don´t like at all. Also, I suspect they have been causing most of the bad news about USDT for gaining adoption of their coin...But who knows, maybe I'm paranoid.
4- BUSD: I just don´t like or trust Binance at all and don´t want to have anything to do with them.

So that leaves USDT, a coin that:
1- Clearly doesn´t have everything backed 1-1 because Tether is doing the same business that banks have been doing for a long time with their fractional reserve system (so I don´t know why everyone is that surprised by this fact really...)
2- I think they are using banks in the Bahamas for their USD deposits (or I think I read about that...so, less regulatory risk)
3- It has been tested with a lot of bad news about the reserves and a lot of crypto bear markets...And the markets weren't able to do a bank run high enough to collapse it...

So, as I said, I don't trust any and I wouldn´t have much money on them, but I choose USDT.