Get Cash?
Are you talking about paper money?
Of course they don’t keep that much on hand in the bank, but paper money is easily printed and cheap. The issue is purchasing power and “trust”, however miss-placed.
Gold always has a value, but most people will not accept Gold for payment of a bill, there is no immediate mechanism to convert it to something they run through their accounting system.
There is not enough cash. Most transactions are checks and cards. They are not really printing cash. Just cyber money.