This is a mistake, you are thinking of the US dollar and USDT as one and the same and this is not true, now if we were talking about a digital dollar created by the US government you will have a point, but we are talking about a private company that supposedly backs each one of their tokens with one dollar, something that has been put into doubt many times in the past and if at some point the government decides to move against USDT then it will crash immediately.
Tether is not endorsed by the US government in any way. It's only "backed" by real dollars stored on the issuer's bank account. With no federal insurance (like the FDIC), you can risk getting your funds lost in the long term. Anything can make Tether's price go all the way down to zero. Either the issuer runs away with the money, or the government shuts it down altogether. It's best to cash out your crypto into Fiat than converting it into a centralized stablecoin like Tether.
For what I know, nothing is guaranteed in the unpredictable world of crypto. You can either become rich or poor in an instant. It's always important to reap out the rewards and get out as soon as possible in order to avoid major losses in the long run. With or without Tether, crypto/Blockchain tech will survive because of its decentralized and censorship-resistant design. If Tether goes to zero, another stablecoin will replace it. Just my opinion
