Japanese investment firm, Metaplanet Inc., has acquired an additional 696 BTC through options.The total Bitcoin holdings of Metaplanet now stand at 4,046 BTC, worth $340 million.Metaplanet executed the purchase at an average price of ¥14,586,230 ($97,512) per BTC, spending ¥10.15 billion ($67.9 million).The company aims to increase its Bitcoin holdings to 10,000 BTC by the end of 2025 and 21,000 BTC by 2026.