Japanese investment firm Metaplanet has purchased an additional 497 Bitcoin for $43.9 million, bringing their total holdings to 2,888 BTC.Metaplanet now holds 2,888 BTC worth approximately $251 million as the stock market responded positively to their Bitcoin strategy.Metaplanet achieved a year-to-date Bitcoin yield of 45.1%, exceeding their quarterly target of 35%.Bitcoin whales have purchased over 20,000 BTC since the price fell below $88,000 on February 24.