I think that the bank is more important that the authorities , because they can rule fiat banking . In fact bitcoin bank should not , but people still need to get to the bank fiat after getting converted from a bitcoin. So now , the bank does not disappear , because bitcoin. In the future.
indirectly, bitcoin relies on bank because the value of bitcoin is taking from fiat currency and controlled by bank it. bitcoin never make a bank disappear from here because they need a bank.