Even for Silicon Valley, Surojit Chatterjee’s rise to extraordinary wealth was lightning fast. : The chief product officer has been with Coinbase, the biggest US crypto exchange, for just 15 months. The former Google executive’s Coinbase stake was worth about $US180.8 million after it’s first volatile day of trading in New York on Wednesday (US time). He’s also set to receive share options within the next five years that are currently worth about $US465.5 million, according to data compiled by Bloomberg.