BlackRock buys over $4 billion of these 2 cryptos this week

Crypto exchange-traded funds (ETFs) recorded strong inflows on Thursday, October 9, with both Bitcoin (BTC) and Ethereum (ETH) posting notable gains.

Namely, of the ten Bitcoin ETFs, three saw a net inflow of 3,356 BTC (worth $407.04 million), with BlackRock leading the pack and pulling in 3,451 BTC ($418.48 million), according to the latest Lookonchain data reviewed by Finbold. Only Greyscale reported outflows, while the remaining six were unchanged. Overall, BTC ETFs are on their ninth day of consecutive inflows.

LookonchainMeanwhile, Ethereum ETFs saw a net inflow of 20,142 ETH ($86.61 million) in total, even with two of them, Greyscale and Fidelity, being in the red. BlackRock again dominated and added 32,968 ETH ($141.76 million) to its holdings

As of the time of writing, the asset manager holds 802,198 BTC, valued at $97.29 billion, as well as 4,083,486 ETH, worth approximately $17.56 billion.

Daily Bitcoin and Ethereum ETF flows. Source: LookonchainDaily Bitcoin and Ethereum ETF flows. Source: Lookonchain**Lookonchain## BlackRock becomes the fastest-growing ETF in history

Given the solid performance across the board earlier this week, the iShares Bitcoin Trust (IBIT) ranked as the top performer by weekly inflows on October 8, reaffirming its position as the fastest-growing ETF in history

Indeed, the fund had added 7,579 BTC ($943.11 million) and 8,959 ETH ($89.49 million) in a single day on Tuesday, October 7, 2025, as well as 6,447 BTC ($805.23 million) and 45,672 ETH ($212.92 million) the day prior.

So far this week, BlackRock has seen a positive net change of +28,737 BTC ($3.49 billion) and +234,615 ETH ($1.01 billion).

As for the two cryptocurrencies, they are both down on the daily chart at the time of writing. BTC is sitting at $121,530, down 1.06%, while ETH is trading at $4,339, having slipped 0.98%.

BTC and ETH daily price. Source: FinboldBTC and ETH daily price. Source: FinboldBTC is sitting at $121,530, down 1.06%, while ETH is trading at $4,339, having slipped 0.98%.

Featured image via Shutterstock

Featured image via ShutterstockFeatured image via Shutterstock