Guillaume Pousaz used to run Europe’s most valuable start-up.
But this year, and after a gamble on crypto backfired, the 41-year-old chief executive had to watch Checkout.com’s valuation come tumbling down.
A fierce competitor, from his days as a youth snowboarder to this October’s Iron Man contest in Utah, Pousaz must now fight if he wants his company to regain its crown.
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