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US spot Bitcoin ETFs just had their best week since April. Net inflows hit roughly $1 billion, making it the third-strongest week for these products since last October, per Bloomberg ETF analyst Eric Balchunas.
That’s a big number. And it lands at a strange moment — right as one of the most trusted names in Bitcoin hardware wallets is dealing with a serious theft. Coldcard, a popular Bitcoin hardware wallet made by Coinkite, lost approximately $116 million in Bitcoin after a flaw in the wallet’s key generation process compromised funds stored in affected devices. The timing is hard to ignore, even if the link between the two stories isn’t definitively proven. Balchunas himself noted the connection remains speculative — but he didn’t dismiss it either.
The “Silent IPO” Is Back
The phrase “silent IPO” was coined last November by investor Jordi Visser. He used it to describe a quiet but powerful transition: Bitcoin moving out of the hands of early holders and into institutional vehicles. ETFs, basically. The idea is that it’s not a traditional public offering, but the effect is pretty much the same — retail and early-stage Bitcoin is getting absorbed into institutional portfolios at scale.
That trend seemed to cool off for a stretch. Inflows were choppy, demand was inconsistent, and regulatory uncertainty kept some institutional players on the sidelines. But the latest numbers suggest the silent IPO narrative is back. A billion dollars in a single week, third-best since October — that’s not noise.
Whether it’s Visser’s thesis playing out again or something more reactive to the Coldcard situation, the money is moving. And it’s moving into ETFs, not hardware wallets.
Coldcard’s Breach and What It Changes
The Coldcard incident is worth slowing down on. Hardware wallets have long been considered the gold standard for Bitcoin security — offline, air-gapped, no exchange risk. Coldcard in particular has built a reputation among technically sophisticated Bitcoin holders who take self-custody seriously. So when $116 million disappears because of a flaw in the key generation process, that’s not a minor story. It’s a crack in something a lot of people considered close to bulletproof.
The flaw wasn’t in the hardware itself, but in the process that generates the cryptographic keys protecting the funds. That’s arguably worse. It means wallets that appeared to be set up correctly were actually vulnerable from the start. Affected users may not have known anything was wrong until the money was gone.
Self-custody has always come with a trade-off. You control your keys, you control your Bitcoin — but you also carry all the risk. No customer support line, no insurance, no recourse if something goes wrong. For technically confident users, that’s fine. For a growing slice of investors entering the market through institutional channels, it’s a deal-breaker.
ETFs don’t require any of that. No seed phrases, no hardware, no firmware updates to worry about. The custodian handles security. That’s obviously not a perfect solution — custodial risk is real — but it’s a different kind of risk, one that a lot of investors seem more comfortable with right now.
Balchunas didn’t claim the Coldcard breach caused the ETF inflow spike. But he said the timing suggests investors may be rethinking their storage options. That’s probably fair. When a widely trusted self-custody product fails at the key generation level and $116 million walks out the door, it’s reasonable to expect some people to move toward simpler, more managed alternatives.
ETF Demand After Months of Volatility
Earlier periods this year saw real softness in Bitcoin ETF demand. Institutional interest wasn’t gone, but it wasn’t consistent. Some weeks saw outflows. The regulatory backdrop stayed murky. It wasn’t clear whether the post-launch ETF enthusiasm would hold.
The current week changes that picture a bit. A billion dollars in net inflows is a signal — not a guarantee, but a signal — that institutional appetite is coming back. Whether it sticks depends on a lot of things: price action, regulation, macro conditions. None of that is settled.
And the self-custody question isn’t going away either. The Coldcard breach will probably push some investors toward ETFs in the short term. But hardware wallet makers will patch vulnerabilities, update firmware, and rebuild trust. They usually do. The deeper question is whether incidents like this gradually shift where the center of gravity sits in Bitcoin storage — and whether ETFs keep pulling inflows even after the immediate security scare fades.
For now, the numbers are what they are. Third-best week since October. Roughly $1 billion in. The silent IPO, it seems, didn’t stay silent for long.
Frequently Asked Questions
How much did US spot Bitcoin ETFs bring in during their best week since April?
US spot Bitcoin ETFs recorded approximately $1 billion in net inflows, making it the third-best week for these products since last October, according to Bloomberg ETF analyst Eric Balchunas.
What happened with the Coldcard hardware wallet breach?
A flaw in the key generation process of Coldcard wallets, made by Coinkite, led to the theft of approximately $116 million in Bitcoin from affected users.
