US spot Bitcoin ETFs have logged a week-long streak of inflows, drawing attention from traders and industry watchers. The run comes during the same period as a reported exploit targeting Coldcard hardware wallets, sparking debate over whether investors are shifting away from self-custody.
The Coldcard exploit
Details of the Coldcard vulnerability emerged this week, though the exact timeline of the exploit remains under discussion. The wallet maker has since released a patch, but the incident has rattled some users who rely on hardware wallets for secure storage. The timing isn't great — ETF inflows were already building before the news broke, but the overlap has fueled speculation.
ETF inflows by the numbers
Data shows a consistent inflow into US spot Bitcoin ETFs over the past seven trading days. The exact figures vary by fund, but the aggregate trend is clear: money is moving into these products. Whether that's a flight from self-custody or just normal market activity is the open question.
What the analyst says
A Bloomberg analyst weighed in, saying the link between the ETF inflows and the Coldcard hack is unclear. That's a cautious take — correlation isn't causation, and the ETF market has its own momentum. Still, the coincidence is hard to ignore for those watching both stories.
ETF issuers will report next week's flows, which should show whether the trend holds. Coldcard users are being urged to update firmware. The bigger question — whether a single hardware wallet exploit can meaningfully shift institutional behavior — won't be answered by one week's data.
