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Key Takeaways
- A Coldcard firmware exploit has drained at least 1,816 Bitcoin (about $114 million) from more than 5,200 addresses since July 30
- Cantor and FRNT Financial both said the breach is more likely to boost custodial and ETF adoption than cause a broad retreat from self-custody
- FRNT compared the incident to the 2023 Milk Sad exploit and expects wallet makers to tighten firmware and hardware security in response
A firmware exploit that drained Bitcoin from Coldcard hardware wallets has renewed scrutiny of self-custody risk, with Wall Street analysts saying the breach could push some investors toward exchange-traded funds and regulated custody providers.
Investment bank Cantor and research firm FRNT Financial both said in Wednesday notes that the exploit is likely to accelerate adoption of managed custody options rather than undermine self-custody outright.
Exploit Has Drained More Than $114 Million Since Late July
The exploit, which researchers say originated in a flaw in Coldcard’s wallet firmware, has resulted in at least 1,816 Bitcoin being drained from more than 5,200 addresses since July 30. The stolen funds were worth about $116 million at the time of the report.
The attack targeted users who had chosen self-custody, a setup in which individuals hold their own private keys rather than relying on a third party. The breach highlighted that self-custody still depends on trust in the hardware and software used to generate and manage those keys, researchers said.
Cantor Sees Upside for Custody Providers and Exchanges
Cantor said the exploit may reinforce demand for publicly traded crypto firms tied to institutional adoption.
The bank said displaced Coldcard users could move toward managed custody providers, potentially benefiting companies including Robinhood Markets, Coinbase Global, BitGo Holdings, Bullish, eToro Group and Gemini Space Station through increased customer inflows.
Nico Pasquariello, a digital asset specialist at Cantor, addressed the potential shift in a note to clients, saying:
“We would expect token flows to custodians and exchanges to increase following the hack.”
FRNT Compares Breach to 2023 Milk Sad Incident
FRNT Financial said the exploit exposed a familiar tradeoff in self-custody. Bitcoin holders who decide to control their own private keys are still dependent on the reliability of the tools used to generate them.
The firm’s Wednesday report noted that many of the affected users had followed established best practices around securing their holdings, adding that the reaction within the BTC community to the exploit was one of heartbreak.
FRNT compared the incident to the 2023 Milk Sad exploit, in which a flaw in key generation led to the theft of roughly $900,000 in digital assets. That earlier breach did not lead to a broad retreat from self-custody, and FRNT said it expects a similar outcome this time.
Wallet Providers Expected to Tighten Security Standards
Rather than driving users away from self-custody altogether, FRNT said it expects wallet providers to strengthen their products in response to the breach.
The firm said the shift is likely to play out on two tracks: hardware and firmware improvements from wallet makers, alongside a subset of investors moving toward custodial alternatives they view as lower-maintenance.
ETFs Offer an Alternative for Investors Wary of Self-Custody Risk
For investors unwilling to manage the operational risk of holding their own keys, FRNT said the expanding lineup of spot Bitcoin ETFs offers an increasingly viable alternative.
Both firms framed the exploit as a catalyst for incremental change in how investors access Bitcoin rather than a structural shift away from self-custody as a practice.
Cantor’s note focused on potential inflows to publicly traded custody and exchange businesses, while FRNT centered its analysis on the tradeoff between control and convenience that the breach brought into sharper focus.
Bitcoin traded near $64,570 at the time of the reports.
