That's why it's best to make use of your money than let it sleep in the bank. I don't mean to just spend it on whatever comes to mind. I mean, make it productive. It isn't easy, of course. It takes a lot of research, analysis, effort, time, discipline, and so on. But that's what it takes if you want your money to bear fruits.
However, that doesn't mean we totally avoid keeping money in the banks. We must always have to set aside a certain amount for emergencies and other unforeseen expenses. This amount we surrender, in a way, to slow death by inflation.
Your point about use money to make money is based on reality and its true that many individual thinks that to keep their savings in banks is safe but they don't know after a period of time due to inflation their money can lost its worth gradually. So if they invest thier money wisely instead of to take it in banks then money grows gradually with time and its becomes a source of income. But its not easy to investing money because its requires proper knowledge and planning and patience because in investing also there is a chance of loss. So maintain money in banks is also have importance because it help out in emergency. No doubt inflation can affects its value with time but its a useful way to stay stronger in panicked situation. So there for we should go in balanced situation like out of savings some money can be put in banks and the other is investing in good companies in this way we have financial security in the form of savings in banks and also our money keep growing through investment.