That doesn't strike me as a problem.
I'm as much in favor of the nation-state as anyone, but I don't think people should be hostage to a particular government's currency manipulation.
Good point; when countries “re-evaluate” their currencies, their people see their cash lose value quickly. I remember years ago when Argentina did it; they had a “bank holiday” where they were closed, but some enterprising people figured out that they could get money out in casinos in Uruguay - so they could spend the soon-to-be-devalued money in their bank accounts before it was decided that it was worth half as much/could only buy half as much.