A look inside the insanely successful life of billionaire Uber CEO Travis Kalanick
Fast forward a few years and Kalanick's company, now just called Uber, is now one of the most lucrative in Silicon Valley.
Uber operates in more than 300 cities in 58 countries, and it could be worth as much as $60 billion.
Thanks to that sky-high valuation, Kalanick made Forbes' list of the world's billionaires this year, where the 39-year-old serial entrepreneur is said to have a net worth of about $6 billion.