This was actually his quote:
In the next 15 or 20 years, I hope I'll be the richest man in the world. That's one of my goals. I want to be a billionaire. I want to get to a position where generation on generation don't have to worry about nothing. I don't want family members from my kids to my son's kids to never have to worry. And I can't do that now just playing basketball.
He said it in response to the question of whether or not he had plans after basketball.