if you think they crypto will replace banks, you don't understand what banks are and how they work
banks are credit institutions. it doesn't matter if they process transactions in COBOL, Bitcoin or Solidity
DLTs can and will save on costs, but that will also open opportunities for banks to expand further
it's not about the underlying technology - the credit can be issued on-chain via tokens, but there will still be heavy regulations and authorization requirements
DLTs/blockchains won't magically replace banks