BlackRock (BLK) is moving deeper into the cryptocurrency exchange-traded fund (ETF) market with a plan to offer income from bitcoin (BTC) exposure. The world's largest asset manager, with an estimated $12.5 trillion in assets under management, filed with the U.S. Securities and Exchange Commission (SEC) a Form S-1 to list the iShares Bitcoin Premium Income ETF. The proposed fund would actively manage exposure to bitcoin, either directly or through shares of BlackRock’s existing iShares Bitcoin Trust (IB ...