[wierd0]

What would be wrong with such a world?

[Nursie]

Multiple competing private currencies?

Exchange rates between them. Middlemen to pay to perform exchanges before you can actually use the currency to buy something. That doesn't immediately sound worse to you?

[yjftsjthsd-h]

Instability is not a desirable trait in currency.

[erikpukinskis]

Instability is a necessary feature of literally every currency in history. You can’t change scales without instability.

Once these currencies hit their natural scale we will see some stabilize.