Why Do Some People Become Billionaires?

Some people become billionaires because they find a way to make a lot of money and keep it. Imagine you have a lemonade stand, and instead of just selling lemonade on the sidewalk, you open up a whole chain of lemonade stands across town, maybe even in other cities. If your business keeps growing like that, you could eventually become a billionaire, someone with a billion dollars, which is enough to buy 10 million gallons of lemonade.