John Warren the multimillionaire businessman who forced South Carolina Gov. Henry McMaster into a GOP runoff has been mining bitcoins while leaving the door open for a return to politics. Warren announced his investment in GEM Mining on Wednesday. Warren said GEM has raised more than $200 million in institutional capital from banks, hedge funds, endowments and pension funds to operate more than 32,000 machines to mine Bitcoin, the world's largest cryptocurrency. Profitable since February, GEM said its November reported revenue was $7.8 million.
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