I can't really imagine an outcome where the current form of governance, with huge, inefficient, warring nation states, will be capable to deal with a situation where they can't print or tax excessively.

To this day I see Bitcoin as a tool for the people, not states, not corporations: Bitcoiners opting out of the larger system, not the larger system opting in to Bitcoin. I don't really see a need for all-encompassing adoption.