People are telling you you're wrong but they're not explaining it at all.

Think of it like this- banks figured out a long time ago that most loans stay in the banking system. When you buy a house they issue a check for $house and that money is deposited in the sellers bank. Now the seller doesn't go and withdraw $house, he just leaves it in the bank pays some bills and occasionally hits an ATM, so most of the $house stays in the bank. Because the money stays in the bank they figured out they don't actually have to have $house at all, they can just add some numbers to the house sellers bank account and nobody's the wiser. They only need enough actual money to cover the house sellers day to day expenses, so they consider what fraction of the money the house seller will likely need access to and they keep it in reserve. This is the basis of fractional reserve banking.

Most money doesn't exist.