Of all that cash, $896 million landed in just two funds. The rest of the field split what was left.
Fresh money into US-listed spot Bitcoin and Ethereum ETFs cleared $1 billion in the week ended Aug. 7, the strongest stretch either group has managed since April. Of the nearly $1.1 billion that arrived across the two categories, BlackRock’s IBIT and ETHA absorbed roughly $896 million — more than four-fifths of the total.
Read that as one asset manager, not a broad revival of appetite for regulated crypto products.
Not one losing day on the Bitcoin side
SoSoValue data puts weekly inflows into spot Bitcoin ETFs at $853.54 million, the group’s largest haul in almost four months. No session finished negative: $170.09 million came in Monday, $211.49 million Tuesday and $244.42 million Wednesday, with demand easing through the back half of the week.
The total cleared the roughly $824 million gathered during the week of April 24. The last better week was the one ended April 17, when Bitcoin funds drew about $996 million.
BlackRock's iShares Bitcoin Trust, or IBIT, accounted for around $693 million of that weekly figure on its own. More than four out of every five new dollars entering spot Bitcoin funds went into a single ticker.
Widen the lens and the concentration stops looking accidental. Since the products debuted in the US in January 2024, the group has logged over $52 billion in cumulative net inflows and now oversees roughly $80 billion in net assets.
A hardware wallet failure sits right beside the timing
The money showed up just days after disclosures of a security flaw affecting Coldcard hardware wallets.
Researchers at TRM Labs put the damage at roughly 1,816 BTC, worth about $116 million, siphoned from more than 5,200 addresses beginning July 30. Other tallies have placed the losses nearer $130 million as researchers keep tracing the thefts.
Bloomberg Intelligence ETF analyst Eric Balchunas flagged the timing of the fund flows relative to the Coldcard losses, while stopping short of claiming that affected self-custody investors moved straight into ETFs.
His argument was that the breach could bolster the case for institutional custody among investors whose main objective is long-term Bitcoin exposure rather than using the asset for transactions or censorship-resistant payments. For that cohort, Balchunas said, the security infrastructure behind large financial institutions could become increasingly hard to dismiss after a failure involving hardware built specifically to keep Bitcoin outside the traditional financial system.
Worth being blunt about the evidence: there is none yet tying the Coldcard breach to this week’s ETF flows. What the calendar does is drop the self-custody versus institutional custody trade-off back in front of people at precisely the moment regulated Bitcoin funds are seeing their best demand in months. Correlation, not causation, and anyone selling it as more than that is guessing.
Ethereum opened the week underwater
Ether funds actually posted the sharper improvement, collecting $244.94 million for their strongest week since April and extending their run of weekly inflows to five consecutive periods.
The start was ugly, though. Monday brought $11.42 million of net outflows before the direction flipped hard: about $53.75 million Tuesday, $60.86 million Wednesday, $92.15 million Thursday and another $49.60 million Friday.
Across that five-week run, roughly $566 million has moved into the products, the longest weekly inflow streak of the year. It is also the longest since a 14-week stretch between May and August 2025 that pulled in nearly $10 billion, which is the comparison worth holding onto. Five weeks and $566 million against 14 weeks and $10 billion isn’t the same animal.
Same script, different ticker
Once again, BlackRock did most of the lifting. Its iShares Ethereum Trust, or ETHA, took in about $203 million over the week, equivalent to north of 80% of everything the category attracted.
Which makes the best week for both Bitcoin and ETH ETFs since April, in practice, a BlackRock week. Two products, $896 million, more than four-fifths of the lot.
Set against the thinner flows that ran through much of the summer, the rebound is genuine, and it is the clearest sign in months that investors are rebuilding crypto exposure through Wall Street’s regulated vehicles. Just read it accurately: this is money consolidating into the two largest funds, not spreading across the field.
Bitcoin is +0.15% over the past 24 hours and currently sits at rank #1 by market cap.
Anyone testing whether the recovery has legs should watch what the non-BlackRock funds do next week. IBIT and ETHA claiming 80% of a good week tells you the top of the category is healthy. It doesn’t tell you the category is.