A security breach affecting Coldcard, a popular hardware wallet used to store cryptocurrency offline, has stretched into its fifth day, with an estimated $114 million in bitcoin reported stolen. The exploit has rattled holders who prize self-custody as the safest way to protect digital assets, and it is contributing to broader weakness across bitcoin and ether markets this week.
Bitcoin traded near $62,595, down 1.5% over 24 hours, while ether slipped nearly 2% to around $1,842. The CoinDesk DeFi Select Index, which tracks decentralized finance tokens, fell 2.5%. The declines coincide with, though are not solely explained by, the fallout from the Coldcard incident.
Why a Hardware Wallet Hack Matters
Hardware wallets like Coldcard exist precisely to remove private keys from internet-connected devices, reducing exposure to the remote hacking and phishing schemes that plague exchange accounts and software wallets. They are the preferred tool of holders who subscribe to the crypto maxim “not your keys, not your coins,” storing funds in cold storage rather than trusting a third-party custodian.
That is what makes this episode significant beyond its dollar figure. A breach tied to a device marketed specifically for offline security strikes at the core assumption underlying self-custody: that removing keys from the internet removes them from risk. In response, some holders have reportedly moved coins back onto exchanges, a reversal of the typical advice given during past custodial failures, when users were urged to move funds off exchanges and into hardware wallets. The irony has not been lost on market participants watching the fallout unfold over five consecutive days without full resolution.
What It Means for Holders and the Market
The immediate price impact — bitcoin down 1.5% and ether down close to 2% — is modest by historical standards for a security incident of this size, suggesting the market has so far treated the Coldcard exploit as a contained, wallet-specific problem rather than a systemic threat to bitcoin or ethereum’s underlying protocols. Still, the episode adds to a list of recurring vulnerabilities in the crypto custody ecosystem, where the choice between self-custody and third-party custody each carries distinct risks: exchanges concentrate assets under one roof and can be hacked or mismanaged, while hardware wallets, despite their offline design, are not immune to firmware flaws, supply-chain tampering, or user error.
For everyday holders, the practical takeaway is that no storage method is entirely risk-free, and the shift of funds back to exchanges by some Coldcard users illustrates how quickly confidence can move between custody models when a specific product is implicated. The $114 million figure, while large, is a fraction of the total value secured by hardware wallets industry-wide, but the reputational damage to the category could linger longer than the financial losses themselves.
Separately, Strategy, the bitcoin-holding company led by Michael Saylor, signaled it may resume purchases after pausing for five weeks — its longest pause on record. That buying hiatus has been funded through preferred stock carrying a 12% rate, an expensive form of capital that underscores how much the company is willing to pay to maintain its bitcoin treasury strategy even while sitting out fresh purchases. Strategy has reportedly been watching bitcoin’s 200-week simple moving average, currently above $63,000, as a technical marker for potential re-entry. That average smooths out five years of price data and is often used by long-term holders as a gauge of whether an asset is trading above or below its extended trend.
What Comes Next
Several threads are worth tracking in the days ahead. First, whether Coldcard or independent security researchers identify and disclose the root cause of the exploit, which will determine if the vulnerability is isolated to specific devices, firmware versions, or user practices, or points to a broader design flaw. Second, whether additional funds are reported stolen as the investigation continues, which would suggest the breach is still active rather than contained. Third, whether Strategy follows through on resuming bitcoin purchases and how that decision aligns with the 200-week moving average it has been monitoring.
Beyond crypto-specific developments, geopolitical noise continues to be a variable for risk assets broadly. President Trump claimed new talks with Iran would begin, a statement Iran’s Foreign Ministry denied were planned, adding another layer of uncertainty that traders may weigh alongside the custody concerns already pressuring sentiment. None of these threads guarantee a particular market direction, but together they frame a market grappling simultaneously with a security crisis in self-custody and unresolved questions about geopolitical stability.
Source: CoinDesk
This content is for informational purposes only and does not constitute financial or investment advice.
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