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- BlackRock now controls over $100B in crypto, with BTC leading at 740,500 coins.
- Ethereum outflows indicate investor caution, while Bitcoin demand remains strong.
- Spot BTC ETFs hold 7% of total supply, signaling institutional confidence in Bitcoin.
BlackRock, the world’s largest asset manager, now controls over $100 billion in cryptocurrency, signaling a growing appetite among institutional investors. According to Arkham data, the firm’s Bitcoin (BTC) holdings have surged to 740,500 coins, valued at approximately $85 billion. Ethereum (ETH) remains the second-largest crypto in BlackRock’s portfolio, with 3.66 million ETH worth around $16 billion.
While Bitcoin accumulation continues to accelerate, Ethereum purchases have slowed toward the end of Q3. BTC holdings grew roughly 6% in the past two months, up from 698,000 to over 740,000 coins, highlighting robust confidence in Bitcoin as a long-term store of value.

ETH Outflows Signal Investor Caution
Despite strong BTC momentum, Ethereum has faced recent outflows. BlackRock’s iShares Ethereum Trust recorded over 58,000 ETH in withdrawals during the past week, translating to a 1.4% drop in net assets from $17 billion to $15.9 billion. LookOnChain reports that BlackRock sold nearly $200 million worth of ETH on September 9—double the $100 million in BTC sold during the same period. This divergence reflects a stronger investor preference for Bitcoin over Ethereum within institutional portfolios.
BlackRock just sold 44,774 $ETH($195.29M) and 900 $BTC($101.67M) again.https://t.co/bcKGkl1VXE pic.twitter.com/xyubPNpGjK
— Lookonchain (@lookonchain) September 9, 2025
Potential developments, such as a regulatory nod for ETH staking, could reinvigorate demand for Ethereum ETFs. For now, BTC remains the flagship asset, with Spot BTC ETFs holding 7% of the total supply—about 1.4 million coins. In comparison, corporate treasuries, led by Strategy (formerly MicroStrategy), hold 4.6% of the global Bitcoin supply, or roughly 1 million BTC.
Also Read: BlackRock Shifts $297M in Bitcoin and Ethereum to Coinbase
Institutional Appetite for Crypto Grows
BlackRock’s increasing crypto holdings underscore a broader trend of institutional adoption. Bitcoin continues to dominate as the preferred asset, while Ethereum faces temporary headwinds amid market corrections and investor outflows. The firm’s strategic positioning highlights confidence in crypto’s long-term potential and indicates a shifting landscape in asset management toward digital assets.
With BlackRock’s crypto portfolio surpassing $100 billion, institutional interest in digital assets is more evident than ever. While BTC remains the cornerstone of investment strategies, Ethereum’s future could hinge on regulatory developments and renewed market demand. This milestone marks a significant step in mainstream acceptance of cryptocurrencies by large-scale investors.
Disclaimer: The information in this article is for general purposes only and does not constitute financial advice. The author’s views are personal and may not reflect the views of Chain Affairs. Before making any investment decisions, you should always conduct your own research. Chain Affairs is not responsible for any financial losses.
I’m your translator between the financial Old World and the new frontier of crypto. After a career demystifying economics and markets, I enjoy elucidating crypto – from investment risks to earth-shaking potential. Let’s explore!
