Let's not generalize things because for sure, some people will srill prefer the traditional way such as banks. Those people who are saving money through banks will still need it. Even there's a lot of technology development and changes in the money world, it will still exist.
Indeed, bank will exist together with crypto and other new technology aside from it. People are really smart to discover a new way that can be use for payment to transact online that is hassle free. But we cant assume banks would not be needed anymore due to this, because still it is trusted of people who recognized bank as a reliable way to save money or take a loan. We can live without banks but it will not die.