Under the influence of increased capital inflows in the past week, the total amount of Bitcoin held by the world's leading asset management company BlackRock and cryptocurrency investment platform Grayscale in their US spot Bitcoin exchange-traded funds (ETFs) has reached nearly 3% of the current circulating Bitcoin supply. Specifically, BlackRock's iShares Bitcoin Trust (IBIT) currently holds approximately 357,736.76150 Bitcoin, while Grayscale's GBTC holds around 227,712.3295 Bitcoin. Additionally, Grayscale holds 5,962 Bitcoin in its Digital Large Cap Fund and 32,692.0926 Bitcoin in its Grayscale Bitcoin Mini Trust. This data reflects the growing interest and participation of institutional investors in the cryptocurrency market, signaling that more capital may flow into this sector in the future.