I am not saying this is an either-or, I am saying that fraudsters like SBF should be thrown in jail and left to rot and people should be taught better how to handle their money.
Yes deposits made with banks still carry risks, but you know what? Most banks are backed by the government (or at least they are in the US, I assume similar setups exist in other countries), meaning depositors generally will not lose their deposits even if the bank loses money. The failure of Silicon Valley Bank is a recent demonstration of those safeguards for peoples' savings at work.
Savings are, literally, savings. You should not be spending your savings, much less your life savings, on something as frivolous as investments which are all fundamentally gambling. Investment monies should come from your spending money, money you don't mind losing. If you are investing your savings, you are investing wrong and you need help from a proper, good accountant.