Lets just say if some people did not have money, they would be as useful as a wet tissue.
If I didn't have money, I could offer my skills to barter for other goods or services. This is what money fixes, it creates a field where everyone can play on.
If a basketball player didn't have a basketball, he couldn't do much. If you didn't have your arms and legs, you probably couldn't offer your skills.
Some people, like Venture capitalists, are good at using money to improve the world. That's the thing they're good at. They might not be good at fixing computers or cleaning toilets, but they're good at managing money.