66. Brian Armstrong and Fred Ehrsam

Cofounder and CEO; cofounder, Coinbase

Despite slumping bitcoin prices, Coinbase, a digital wallet used to buy and manage the digital currency, is on the rise. The startup raised a $75 million round in January — a record-breaking amount for a bitcoin company at the time. Investors include the New York Stock Exchange, Andreessen Horowitz, and banks USAA and BBVA, and the round supposedly puts Coinbase’s value at $400 million.