U.S. regulators are soon expected to decide whether to approve the first bitcoin exchange-traded fund, a development that could thrust the once niche and nerdy corner of the internet even further into the financial mainstream. The regulatory greenlight has been anticipated for several months and the price of bitcoin has jumped about 70% since October. In a twist perhaps appropriate for the unpredictable crypto industry, a fake tweet from the Securities and Exchange Commission’s account on X Tuesday stated that trading of bitcoin ETFs had been approved.