If you are so sure, feel free to short Tether.
Stablecoins in principle face the issue of pegging against something that dillutes at will.
But specifically USDT: How is Tether's peg supposed to work if it's alledged backing assets consist of other crypto assets ?! Shouldn't they seek less crypto exposure for stability?
Assets which are BTW unsatisfactory disclosed considering a) comparison with established equity markets and b) that such disclosure only exists at all due to law-enforcement.
In short, I’m confident it will fail and fairly spectacularly but I don’t know when and I’m also not sure how to go about shorting it.