You might not have realized it but Houston, Texas is the home to one of the youngest billionaires in the United States. Of course, Texas is no stranger to being home to rich people, but not many people become billionaires before they hit 50 years old. Only a few names like Mark Zuckerberg & Brian Chesky are able to pull that off. But that is the case of Scott Duncan, who has a stake with the Enterprise Products Partners natural gas & crude oil pipeline company in Houston, Texas.