Banks are only required to keep 10% of their deposits! The other 90% of your money goes out in loans! If enough people can not make loan payments. They run out of cash. It takes I think up to 30 days for a cash request from the fed to be delivered. If someone goes to the bank for a withdrawal and are refused. That person can now go on social media and announce that to the world! Which will send in other people to get their money out! Soon, that bank closes its doors. Remember 2023? I know it feels like years ago now!