John McAfee is found dead in his Barcelona prison cell, hours after a Spanish court approves his extradition to the United States on tax evasion charges. The antivirus pioneer and crypto provocateur had become one of Bitcoin's most colorful advocates, famous for his $1 million BTC price bet — "The Dickening" — which remained unfulfilled. His final tweet read: "I have nothing. Yet I regret nothing." He was 75 years old.
Wikipedia: John McAfee