Crypto does fiat banking quite nicely

Deutsche Asks A Stunning Question: "Is This The Beginning Of The End Of Fiat Money?"

We think the final break with precious metal currency systems from the early 1970s (after centuries of adhering to such regimes) and to a fiat currency world has encouraged budget deficits, rising debts, huge credit creation, ultra loose monetary policy, global build-up of imbalances, financial deregulation and more unstable markets. The various breaks with gold based currencies over the last century or so has correlated well with our financial shocks/crises indicator. It shows that you are more likely to see crises/shocks when we break from hard currency systems. Some of the devaluation to Gold has been mindboggling over the last 100 years.

Fiat banking does not go away, it become crypto fiat banking and works better than the old version.

We periodically left the gold standard in the past because government go broke,  But the sandbox can handle government default nicely, spreading the pain fairly.