[unkated]

A couple points...

• CivGov would certainly push the continued use of the Greenback as a means of keeping normality.
  
• It would eventually sink in with the general population that there is no inherent value in paper money.
  
• However, in places where things are reasonably normal - meaning there is enough food, and a fairly wide variety of goods available for which one can exchange (and re-exchange) greenbacks, their use may continue. Paper cash is a promise that there will be normality again, for which cash can go back to having value.
  
• In places where there is scarcity, fewer people will be less inclined to use a medium of exchange (paper cash) they may not be able to use. however convenient it is to carry.
  
• CivGov or Milgov can (and in my opinion likely will), of course, wreck the value of cash themselves by printing as much as they need to pay for things, triggering runaway infaltion themselves. This is likely to be a localized issue - say in the greater Denver area, and can occur multiple times.

Uncle Ted