in the future people are not going to use fiat currency they will addict to use crypto basic currency to use day today activity.
Not totally. Fiat still give convenience to people especially under developed countries so I think they will be the only reason for banks to strive and stay alive.
Even cryptocurrency exist it does not mean that banks will lost their use. For me it is more safe to save money in the banks. There are still many people who will choose to make their fund and savings more secure. After trading I save to banks some of money and some are on online wallet that can be use for investment. Banks are one of the company that contribute for the growth of economy through paying their tax.