Mark Karpelès

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Mark Karpelès is a French entrepreneur and former CEO of the now-defunct Bitcoin exchange Mt. Gox, which was once the largest Bitcoin exchange in the world. He became widely known after Mt. Gox filed for bankruptcy in 2014 following a massive hack that resulted in the loss of hundreds of millions of dollars' worth of Bitcoin. Karpelès has since faced legal issues, including a conviction for embezzlement in Japan, though he maintained that he did not steal customer funds. Recently, he was in the news due to a data breach involving Revolut, where personal details regarding his banking transactions and Bitcoin activity were potentially exposed.