Institutional interest in Bitcoin has surged in 2025, with major ETFs significantly increasing their holdings. BlackRock's iShares Bitcoin Trust now holds 770,791.5 Bitcoin, having added 218,874 BTC this year. This accounts for 3.67% of the total Bitcoin supply, valued at approximately $67.1 billion. Similarly, Strategy has expanded its Bitcoin holdings to 672,497, with an addition of 225,827 BTC in 2025, representing 3.20% of the total supply. These substantial increases highlight the growing institutional demand for Bitcoin as a key investment asset.