Banks definitely seize your money. When I was a young teenager my parents encouraged me to put my lawn mowing money in a bank account. I had a total of $100.00! We went over to Bank of America and I opened up an account and deposited my hard earned cash. A month or two later I tried to withdraw some cash and was told I had no money. My full $100.00 had been consumed by insufficient balance fees.

A valuable if painful lesson to learn. I still do all my personal banking with a credit union and consider my relationship with banks to be adversarial. They only own my debt, never my cash.