I think the USD system is in better shape than literally any other system, and so it’s certainly plausible that there is a global sovereign debt crises that make the dollar stronger relative to every other fiat as global institutions rush into the dollar safe haven.
I agree the USD system will eventually collapse as all government currencies do, likely to be reborn into something “new” but functionally just a devalued reiteration in a new wrapper. But this won’t happen until it happens to every other sovereign currency first.