I don't get it.
So you are saying that i should put my money in a brick and mortar Bank , because it can keep them safe and then you tell because i can't defend against navy seals?
There is only one important advantage that keeps all my money in banks.
FDIC insurance.
If someone at the bank fucks up, it gets robbed, burns down, etc, I keep all my money.
Networked banks (chains) even more so, since no single bank actually has my specific stack of money. Unless
all the banks in the chain burn down my money is relatively safe.*
* this probably isn't entirely true - a failure of the bank's database + backups could potentially wipe out my stack of money. Your home is probably considerably less immune to fires, etc.
What happens if the entire Federal Reserve system goes insolvent? Good thing the FDIC is going to give you Federal Reserve Notes to settle your claim.....
Maybe you can figure out how to make Frylock and Meatwad to go with Mr. Lincoln out of all that origami paper you'll have.