[BlackRock Bitcoin Yield ETF Controversy Heats Up: Strategy Design May Have Flaws, Long-Term Could Underperform BTC] 10x Research analysis points out that BlackRock's Bitcoin Yield Enhanced Exchange-Traded Fund (BITA) may have strategy design flaws. Its method of generating income by selling call options could lead to investors underperforming spot Bitcoin in most market conditions, potentially failing to achieve desirable absolute returns.