A comparison between regular banking and Bitcoin, or any blockchain 'currency' is a sttange thing to attempt.
As a currency Bitcoin is more akin to Collaterized Debt Obligations and the like which from yhe early 00's were used in the mortgage market.
The value is theoretically their due to an underlying thing, but in reality the value is notional.
The poorly regulated secondary (& tertiary) mortgage market collapsed the world economy.
Wr've just seen a single crypto exchange collapse with somewhere around $10b being wiped out.
As a former stockbroker I'm firmly of the opinion that the general public needs more protection from volatile financial products, whether centralised or decentralised.
And the public purse should not be bailing out private institutions who can't do their sums. When a thing becomes 'too big to fail' then it needs broken up into smaller parts.