There is lots to unpack here :)

First, banks are likely to be more regulated rather than de-regulated. The governement grip on FIAT currency is absolute, that is why crypto is so threatening (as Peter Thiel said, "governments loves AI and hates crypto").

FIAT and cryptocurrencies are run by opposite paradigms (centralisation vs de-centralisation). Even more, the original architeture of Bitcoin allowed for the ledger to be validated basic by anyone with a laptop, which made Bitcoin the only potentially fully democratic currency in terms of decision power.

I personally see a future where slowly every country will ban or limit enourmously the circulation of private crypotcurrencies which will be replaced by governement backed cryptocurrencies. These will curculate alongside traditional FIAT currencies.