Last part is a trope but human societies around the world use different things as money, including counterfeit notes in Somali http://jpkoning.blogspot.com/2013

Last part is a trope but human societies around the world use different things as money, including counterfeit notes in Somali http://jpkoning.blogspot.com/2013/03/orphaned-currency-odd-case-of-somali.html http://jpkoning.blogspot.com/2013/03/orphaned-currency-odd-c... In fact I doubt gold/silver becomes money because it’s generally too rare and inconvenient (hard to cut the gold bar without tools even if you have one). Realistically people will just keep using cash.