Average person still wants something tangible to fall back on... probably 3/4 or more of all people here in the US still use cash to some degree. Plus, I know quite a few people who absolutely refuse to use a bank issued "debit card" = on an everyday basis they use only cash.
The argument for or against is debatable as when one write's a check that is essentially a 99% all-digital transaction nowadays.
Still, I want cash money.
If it ever returned to bartering I would start a still somewhere in the woods and make moonshine... that's always easy to barter with.