paper money may only be used as a sign and as an exchange and as a currency that is very easy to create because it does not require resources that are very difficult to find. until now many people still use paper money.
Paper money is what the government accept to be used by their people as exchange. Before we are just exchange things without need of money but now we cannot get what we want without paper money because that become the practice. It changes and now digital money is acceptable too. But whatever kind of money is that, we are working to get it for living.