Well you can do that in cash or crypto. But you still want to the banks protection, right?

You could go down and withdraw your 20mil dollars and put them in your couch. But you kind of like that the bank takes care of security for you.

But you don't want to pay for that insurance?

When you start a company, you already insure tonnes of things. You employees, etc. Why not your financial position.

Do you also expect the society to take care of your liability insurance? or health insurance?

(It is actually laughable, that Americans think that the government should insure their deposits but not their health)