Bank can secured only your money and not to work for you to become rich. Its better to put your money in any investment, bank can teach you for saving your money but most the bank offer some stock market or mutual fund. If you want to be profitable join in any investment.
In fact they are giving a small amount as an interest but holding your big amount of money and in response getting a small interest in not can make you a rich person, through this you are just wasting your time and devaluing your money, i think that you should invest your money in a profitable business and should start trading where you can make a good amount of money from trading which can make you rich in no time.