Final answer:
Money is not valuable on its own, but rather for the goods and services it can be exchanged for. When people express a desire to 'have money,' they want to acquire the goods and services that money can buy.
Step-by-step explanation:
Money for the sake of money is not an end in itself. Ultimately, the usefulness of money rests in exchanging it for goods or services. Money is what people regularly use when purchasing or selling goods and services, and thus both buyers and sellers must widely accept money. The desire to 'have money' is really a desire to acquire the goods and services that money can buy.