On September 3-4, 2025, BlackRock, the world's largest asset manager, executed a significant strategic shift in its cryptocurrency holdings. According to verified on-chain data from Arkham Intelligence, the firm sold $151.4 million worth of Ethereum (35,009 ETH) from its wallets and simultaneously purchased $289.8 million in Bitcoin.
This move resulted in BlackRock's iShares Bitcoin Trust (IBIT) recording the largest single-day inflow of nearly $290 million, solidifying its position as the dominant Bitcoin ETF with over $58 billion in cumulative net inflows. Conversely, the iShares Ethereum Trust (ETHA) experienced an outflow of $151.39 million on the same day. Despite this substantial institutional activity, both cryptocurrencies saw price declines on the day of the transaction - Ethereum dropped 3.29% while Bitcoin fell 2.09%.
The reallocation marks a notable shift from BlackRock's previous position, where it had purchased $300 million worth of Ethereum earlier, indicating a changed outlook. The move highlights a growing institutional preference for Bitcoin's perceived safety and liquidity over Ethereum in the current market environment.
