Billionaires

In 2006, billionaire Ingvar Kamprad revealed that he stayed rich by driving an old, used car and collecting salt and pepper packets from restaurants.

9505 Gloaming Drive in Beverly Hills, California is one of the most expensive luxury rentals in the world—perhaps because it has room for your own personal car museum.

The idea of the self-made man is integral to the American dream: It's the belief that anyone—regardless of their circumstances—can achieve greatness through hard work, grit, and determination. Here are some of the world's greatest self-made men.

Maybe money does grow on trees. How else would explain why anyone would spend this kind of money on these items?

You might think that the world's billionaires would know it all when it comes to money, finance, and investing, but Jim Cramer thinks otherwise.

Billionaires have more money than they could ever need. They hold the rare power to change our world. What, then, do they do with all of that wealth?