Groups comparison

Currency (money) - 1970 to 2022
Uses consistent abstract medium of exchange such as coins of intrinsic or fiat value, government or bank issued notes, credit, or an abundant consistent commodity

Split currency - 1994 to 2016
Wealth is split into several types of cash of differing value.

Multiple currencies - 1995 to 2015
Uses more than one incompatible but perhaps exchangeable currency systems.

Unusual currency - 1997 to 2015

Universal currency - 2003 to 2004
Same money works for primitive apemen as it does for high-tech networked robots.