Mark Cuban poses for a photo
Mark Cuban has said there's no downside to being a billionaire.
  • Mark Cuban once said there is no downside to being a billionaire.
  • So, how do you become one?
  • The most common way is to start or buy a company and make it worth billions.

Billionaires are controversial these days. Some people admire them. Others blame them for society's ills.

But, according to one friendly billionaire, Mark Cuban, there's no downside to being one.

So, how does one become one?

There are three legal ways.