Well when customers start notifying their banks that they are dropping their account and switching to a card they can use to purchase Bitcoin that will change fast. It will just take a few banks to step up and say Bitcoin purchases welcome.
They don't want people investing in crypto as ever dollar invested in crypto is a dollar not in your savings or checking account that provides the bank with capital to loan out (for that escalade). Banks need deposits to loan out to make money. Crypto isn't on their best interest. Plus basks want you in debt. People investing in crypto wasn't to use the gains to pay off loans. That's not in the banks best interest. Banking 101. Don't fall for the hype.