BlackRock, a multinational investment company, shocked many in the cryptocurrency industry in June when it filed an application for an exchange-traded fund (ETF), the iShares Bitcoin Trust. It’s seeking to overcome 10-year-long opposition from United States regulators to cryptocurrency ETFs. A spot Bitcoin ETF would be tradable on a traditional stock exchange and track with the market. While supporters argue that ETFs are tax-efficient, easy to trade and cheap, BlackRock’s approach is arguabl...