Profile of Vijay Shekhar Sharma, founder of Indian digital payments company Paytm, which hit a $15B valuation in less than a decade, and now plans to go global (Rishi Iyengar/CNN)

Rishi Iyengar / CNN:
Profile of Vijay Shekhar Sharma, founder of Indian digital payments company Paytm, which hit a $15B valuation in less than a decade, and now plans to go global  —  To say that Vijay Shekhar Sharma is ambitious is an understatement.  The founder of Paytm, India's largest digital payments company …