Discuss money is what money can buy?

Money is what money can buy means that money is only as valuable as what it can get you. For instance, during a natural disaster, money will not buy essentials like electricity and water, deeming it useless.
This overly-simple statement refers to the liquidity of money. If you had $5, you could walk into any store and purchase anything that cost $5. So you technically have every good that costs $5. In other Words, money is so easily transformed into goods that it is like having the good itself.