Whatever banks do, they will not lose the trust of some people, because the meaning of the bank is authority, the meaning of paper money is the trust given by the state. Western European countries with strong banks are in a different situation. In the Middle East and Asia, they have been exposed to many bank frauds over the past 50 years. As a result, the bank's hand is strong.
Banks will always be here no matter what. It is already carved in our community. And not all people that are not using bank services are into crypto. Some just don't want to use bank or not capable of utilizing their services. So I won't say that if there's bank loss, it is always crypto's gain.