It is a thing that wont really happen to banks, as long government do exist then this institution would stay.
Its better not to expect too much with crypto about taking down banks because this is really an impossible thing
to happen.
There might be some advantages but doesn't mean that it will totally crippled out typical banking system.
Still lots had been trusting the good old fiat days rather than on completely trusting the whole
crypto system.
So let it be just like that.
I don't think Bitcoin will cause the collapse of central banks in the mainstream world. They're still too big to fail even with the damaging effects of the COVID-19 pandemic. Not even crypto/Blockchain tech's innovations have taken central banks' place in the mainstream economy. As long as governments depend on central banks for the issuance and management of Fiat money, they won't be going anywhere. Bitcoin and other cryptocurrencies will only remain as an alternative than a replacement to the existing monetary system.
Nonetheless, nothing is set in stone. If banks collapse, then governments might head back to Gold or adopt decentralized cryptocurrencies as the new standard of money. But the odds of this happening are very slim. With banks announcing they'll launch CBDCs (Central Bank Digital Currencies) of their own, it seems to me that they'll be here to stay. They'll just adapt themselves to the latest trends in technology. Bitcoin and other cryptocurrencies will co-exist with the new digital Fiat system for many generations. Just my opinion