Be in the know that even if this shit happens, then the bank is replicating CEX and not decentralization in any way, also that would be a trap to further expose wallet addresses linked to people_{maybe the one that would escape blockchain analysis} would be linked to the account holders that uses it as a medium of transactions and how simple it would be to link wallet addresses to individuals. It is very simple, if you value anonymity and privacy, avoid anything associated with centralization because it often leaves traces behind and mitigates your privacy and/or anonymity.