Yeah, that seems interesting.  There probably is a floor in the sense that at some point, sellers will simply stop accepting the poor quality money.

In *that* sense, Gresham's Law does seem to require a government decree that fixes the nominal value of a bad currency and requires sellers (or a subset of sellers) to accept it.

Either…both

For instance, the dollar is gaining use in many places that have even more inflationary regimes.

Undisciplined