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    Cofounder and CEO
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Armstrong is building Coinbase, the biggest U.S. Bitcoin exchange, into what his team hopes will become “the [f500link]Google[/f500link] of crypto”—as relevant to the next wave of the web as Google was to the last. While it has a way to go, it’s on the right track: During this winter’s investment mania, Coinbase catapulted into the mainstream, eclipsing [f500link]Charles Schwab[/f500link] in total accounts. Now the company is investing in upstarts and making acquisitions—including one that secured it a path to several tantalizing financial licenses.

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