See, yes, that's why I wish I had been more aggressively risky in my early 20s with music, which I think fits this definition of business. Plus you have intellectual property - I have friends still making money every time their song is on the radio or tv. In your early 20s you have little expenses, lots of energy and the return is high if you can make it. Few people in their 30s or 40s can take those risks. And if it doesn't work out, well, you had fun, too. :-)