BlackRock's Bitcoin spot Exchange-Traded Fund (ETF) manages assets close to 70 billion USD, reflecting growing interest from institutional investors despite a slowdown in retail capital inflows. BlackRock holds Bitcoin worth over 69.70 billion USD through its iShares Bitcoin Trust (IBIT) ETF, accounting for 3.25% of the total Bitcoin supply. IBIT commands more than 54.7% market share in the US spot Bitcoin ETF market and holds 6.12% of the total Bitcoin supply overall. Since the first trading of the US spot Bitcoin ETF on January 11, 2024, BlackRock's ETF market has seen continuous capital inflows, with a single-day net inflow reaching 388 million USD. IBIT has become the world's 23rd largest ETF. Nevertheless, analysts note that miners' profit-taking and selling pressure have offset ETF demand. On-chain data shows that large transactions dominate Bitcoin network activity, with an average transaction amount of 36,200 USD. Transactions exceeding 100,000 USD account for over 89% of network activity, indicating increasing dominance by large participants. Retail investors have decreased, and the number of short-term Bitcoin holders has fallen, suggesting that "new funds are drying up." If demand continues to weaken, Bitcoin may find significant support around 92,000 USD.