We're not speaking about the same thing while talking about money across the globe. That is the first problem that has to be addressed.
I like to see it this was, is a tradable entity defined by:
- Destruction Resistance
- Identifiability
- Mobility
- Counterfeit Resistance
- Ability to Store Value
- Availability
- Devidabilty
It's not money that is the problem, but some of the rules beyond institutionalized money systems are rather "hard to believe" to be enforced via FIAT.