According to @StockMKTNewz, BlackRock’s bitcoin ETFs have reportedly become the firm’s most profitable product line, indicating leadership in profitability among its products (source: @StockMKTNewz on Twitter). According to @StockMKTNewz, the post provides a headline claim without revenue, AUM, or timeframe details and characterizes the information as reportedly sourced rather than an official filing (source: @StockMKTNewz on Twitter).