Central bank money is backed by tax relief

The Wolf of Wall Street

"I'm not saying cryptocurrencies, there won't be one – there will be one – but there has to be some backing by some central governments out there.
If any digital currency demonstrates long-term viability, it will probably be one that’s backed by a central bank."

Nothing makes for utility then buying off the local sheriff and his posse.

 Monopoly fiat money is all about taxation then regulation by central government.   Government denominates important taxes by ratio, which is currency independent.  There will be as many crypto currencies as needed to meet government tax needs.