I hope I made a good point there
Yes op, you make a good point by saying bitcoin will not eliminate bank. Bank have play a lot of activities that is making bitcoin to continue spreading globally because many people have converted their bitcoin to fiat through bank to purchase whatever they want from their country, without using bitcoin that is not allow in their country. You can save fiat in the bank and other documents while you can only save your bitcoin in your wallet but you can't save other documents in your wallet, which is the reason I say bitcoin will continue existing and bank will also existing for people to make use of them to achieve their purpose. Since, we know that the founder of bitcoin didn't created bitcoin to be into competition to eliminate bank, I don't think such thing will happen to bank because it's government source of income.
Yup, it will coexist and will work alongside each other, bank is for those who continue believing that traditional is still the best way to save while to those who understand the use of Bitcoin not just for investment, or to earn but to the point why it was created, they will use it the way it should be, it won't affect both in terms of existence, they will both serves the purpose why they exist.