BlackRock and Metaplanet have been actively buying Bitcoin during market dips and volatility.BlackRock added 12,272 BTC ($742M) in 16 days, bringing their total holdings to 369,822 BTC.Metaplanet purchased 108.99 BTC for ¥1 billion, increasing their total holdings to 748.50 BTC.Recent Bitcoin price volatility led to $53 million in long liquidations, while a whale panic-sold 800 BTC, losing $26M.