We face alot when it comes to withdraw your savings in the Bank , banks also run out of cash ah times but isn't and never will it be possible that there's no cash in bank there may not be enough cash for your demands you want to withdraw at the particular moment.bank as it own problems with customers ,the cashier can even utter a word you will be very annoyed with unto your savings money you want to withdraw.
It seems like you don't understand the banking system so you say things like this without thinking that the bank always turns its money into other things through the customer money they have and when there are customers who withdraw large amounts of cash. The bank will definitely have difficulty in serving it for a full day because they have to take money from other places to cover it so everyone should think a little logically that the bank could go bankrupt if all their customers withdraw all the money they have saved in the same time The same.
If you don't believe what I'm saying, you can do your own research into what banks do with their customers' money. And I'm sure you will find the answer quite surprising because the bank also really wants to make a profit from the customer's money that they hold so I'm not surprised that when there are customers who withdraw large amounts of cash, the bank has a little difficulty in fulfilling it. Even though this can be handled, in that one day, it will definitely be a bit of a hassle to prepare the cash.