I don't think you understand what "investing" is. Investing is giving money to someone (or even just a bank) in exchange for something which might change value

I don't think you understand what "investing" is. Investing is giving money to someone (or even just a bank) in exchange for something which might change value. That person is then going to go spend the money somewhere else. There's pretty much no way to prevent money from moving around other than turning it into cash and burying it.