Majority of people still think traditionally and would choose bank deposits over crypto. Banks are not going anywhere.
the thoughts that you convey can happen for the time being and the development of the times and technology will change all such thoughts, practically efficient and fast that will be needed in the future along with the development of the era and technology, especially the economy
That will take long time. The rate at which the technology is spreading right now is very slow and there are technological efficient countries that refrain to give the technology to the rest of the countries for their own political reasons which is the reason we still have so many countries that do not even have the basic internet access.
SO what I want to say is that there is no impossibility in the fact that people will stop going to banks once the technology take over but we would have to wait for that time.