Alain Pitton/NurPhoto via Getty Images This story is available exclusively to Insider subscribers. Become an Insider and start reading now. Norwegian tycoon Kjell Inge Rokke recently joined a growing list of billionaires to embrace bitcoin. In a 23-page shareholder letter, Rokke breaks down his three-fold bitcoin investing strategy. He details why he sees bitcoin as a solution instead of a problem for its perceived challenges. Yet another billionaire has jumped on the bitcoin bandwagon. This time, it's Norwegian tycoon Kjell Inge Rokke. Rokke is the chairman of the $6 billion industrial conglomerate Aker ASA, which has ownership interests in oil and gas, renewable energy, maritime assets, industrial software, and more.