asset manager, AUM, Bitcoin, bitcoin futures, Blackrock, Crypto asset, Finance, microstrategy bitcoin, U.S Securities and Exchange Commission's (SEC)SEC Filing Shows Blackrock Held Bitcoin Futures Contracts Worth $6.15 MillionCoinotiziaApril 3, 2021, 10:03 pmApril 3, 2021 Comments Off on SEC Filing Shows Blackrock Held Bitcoin Futures Contracts Worth $6.15 Million 40