Georgian billionaire and former leader Bizina Ivanishvili, who turned down a $50 million Bitcoin mining investment a decade ago, missed out on an opportunity now potentially worth as much as $21 billion, is taking extreme measures to recover what he believes to be "stolen" Bitcoin. He accuses his former financial advisor, Bachyashvili, of using loans from his bank to mine 24,000 Bitcoins and refusing to share them. Bachyashvili was kidnapped in Abu Dhabi in May and extradited to Georgia, where he is currently serving an 11-year prison sentence. (CoinDesk)