Probably better—one nation wouldn’t need to maintain its currency as the world’s reserve currency. Demand would drop, increasing that nation’s export competitiveness and reducing inequality.
I know that’s what bitcoin proponents would say, and this appears true to me on the surface.
I also see huge incentives for governments, banks, payment companies, tax companies etc. to NOT want this to happen. Some for self preservation and immoral reasons and some for legitimate humanitarian reasons and to prevent anarchy. It’d be nice if someone could paint the unbiased vision of what the future world would look like in that scenario.