This is my opinion.Banks won't make you rich.saving in bank can never do that,because of interest rate that bank gives you is too tiny.You saving will be simply be eaten up by the sleepy monster called inflation. As a example I will take ,When I'm in grade school,each day I received 10Rs (my country currency) from my mother.It was enough to by me 2 meals,but in now 10Rs enough to buy 2 candies. 
Banks are just for keep your money safe! 
Yes everyone know about the income from the banks and they also know that banks will not give you the opportunity to increase multiple folds your money within a few months just like bitcoin is doing for you. That is why investing in banks is just losing your upcoming profit from the bitcoin. Just put your money in bitcoin if you want to be rich. Banks are just for keep your money safe!