Sounds impossible. If the money is just shoved in a vault, the bank has to come up with money for rent/taxes, payroll for someone put the money in and take it o

Sounds impossible. If the money is just shoved in a vault, the bank has to come up with money for rent/taxes, payroll for someone put the money in and take it out, etc. If the money is guaranteed to be there, then it can't be 100% of it.