The Top 10 Youngest Billionaires

7. Anton Kathrein, Jr. – Antennas – 30 years old

Another family business on the list, and one we couldn’t do without as a society – cell phone antennas, receivers and cables. Long story short: there was a German dude who made all sorts of antennas for TV and radio, he got famous and made a lot of money. How much? Just around $1.7 billion. Not too shabby, eh?