S2, E4: Mark Karpelès, a self-taught programmer with an IQ of 190, became CEO of MtGox in 2011, transforming it into a major Bitcoin exchange. Born in France, Karpelès moved to Japan after a controversial past in Paris, including hacking his former employer. In 2015, he was arrested in Tokyo, suspected of involvement in the disappearance of millions in Bitcoin, captivating the online world with his story.