Earlier quoted context omitted.
Can't you exchange goods and services for crypto, without using fiat? Transaction fees are obviously unfortunate, but there is just no going around the need for infrastructure. And where is an infrastructure - there are maintenance fees, crypto isn't unique in this regard.
It’s not “without using fiat”: cryptocurrencies are pure fiat currencies but with very weak backing — people need sovereign currencies to pay taxes, pay or get paid for government functions, and participate in large preexisting economies. Nobody has to use cryptocurrency for those reasons and the variable, usually high, fees discourage use — especially in the case of Bitcoin where the economic model incentivizes hoar…
I thought even Bitcoin maximalists have given up on this nonsense by now? Fiat money is legal tender backed by the taxation power of a nation state and ultimately, the monopoly on violence. This is why I always write crypto"currency" -- even naming so, crypto shills have pulled an ingenious move pretending their scam is a currency which it utterly is not.