We cannot afford to go only with bitcoin wallet at a moment as in real world we need banks for our transactions as we need fiat for making purchases and for that we also need banks.
Banks is a company and even struggling to reached by most of the average joes.
So how much more in bitcoin where accessing and usage is really limited. No way I will choose one of them since Im getting advantage using both of them.
But for me bank is going to be more important than bitcoin wallet, because there are still few store that are not yet accepting bitcoins. So for me, many are going to choose banks rather than bitcoin wallets. But there are some people also that are going to choose bitcoin wallets for it is just charging very small fees per transation.
In the end banks will always play the main paper at online as day-by-day life, crypto currencie its just an option and always will be, doesnt matter if its mass adopted or not. I do use bitcoin wallet as my bank from online earnings, i will do any task online and i would choose bitcoin or crypto as payment if not possible i will exchange the fiat to crypto.