Mastercard is an obvious choice for investors. Under Banga, the company is playing a leading role in the future of fintech. Its state-of-the-art transaction systems, cybersecurity and wide-ranging partnerships will be even more important as everything from subway rides to government transfer payments go fully digital. This is a digital transformation story. The growth of the less cash world benefits all transaction processors. Banks will also share the spoils. Moving away from passwords, toward biometrics, will reduce garden variety identity theft fraud in a meaningful way. However, one should bet most on Banga. Mastercard was worth $31.2 billion in 2010, when he began guiding the company. Nine years later, the market capitalization is $247 billion. Shares have soared 885%. Even with the growth, the stock trades at only 26.5X forward earnings. That is entirely reasonable given where transaction processing is headed, and Mastercard's position.