You've just listed some horrific risks.

There is absolutely no way I would ever store a large amount of money in a stablecoin for any period of time. You are entirely dependent on the competence and good will of the one single operation running it. If they go, so does your money. No one else is going to bail you out.

These companies are also incredibly paranoid about preserving their position so will be desperate to please any authorities that hassle them.

There are enough exchanges with real dollars. Use those instead. For the sake of a small trading and transfer fee you might be saving the entirety of your funds.