My bank giving me 3.5% per year on savings account and 10% on Fixed Deposit (they increased FD interest few days back) DON.
Real inflation is in double digits (10%+) in many countries and jurisdictions. If you are earning less than that, then you are losing the purchasing power of your money in the bank. You should use it to pay off debt, and to purchase capital goods you can use to generate more profit. The banks do not give you a good guaranteed return on your money, they cannot because the central banks inflate the currency constantly, driving down the value of each individual unit you save. The trick is, to convert your money into a tangible good like gold or silver coins, something that holds it's value over time.
My bank only pays me 3.5% a year for my saving account. I really do not have that much money in the bank so I really make a small amount of interest.