Governments hate the barter system because it is very hard to tax.
So expect government interference at every turn.
The ultimate barter - gold coins, silver coins, whiskey, cigarettes, tools, etc.
Can't eat them, can't put them in your gas tank, can't kill your enemy with them, can't diaper your baby with them ...
So their utility is ...?
barter- experience, meds, experience, experience, experience...