Your Bitcoin Wasn't Hacked. Your Wallet May Have Been.

When bitcoin disappears from a wallet, headlines often say Bitcoin was hacked.

That description is usually wrong.

The Bitcoin network can keep operating exactly as designed even when someone loses control of their bitcoin. The cause is usually something else: a compromised device, a defective implementation, an exposed recovery phrase, a failed custody procedure, a dishonest insider, or another weakness outside the protocol itself.

That distinction is more than technical. It can determine what happened, who may bear responsibility, what evidence matters, and whether the owner has a viable path toward recovery or damages.

The recently disclosed Coldcard security issue illustrates the point.

Coinkite issued a security advisory about how wallet seeds were generated on certain Coldcard devices and firmware versions. According to the company, some affected seeds carried less entropy, or randomness, than intended. Coinkite warned that funds tied to an affected seed could remain at risk and that updating the firmware alone would not repair a seed already created. Its guidance was to generate a new seed on corrected firmware and migrate the funds, subject to the advisory's stated dice-roll and passphrase guidance.^[1][2]

Public reporting has linked the issue to unauthorized Bitcoin transfers. The number of affected owners, the attribution of particular transfers, and the total amount of any resulting losses remain subject to investigation.^[7]

The essential point, however, is already clear: the reported vulnerability did not require an attacker to break Bitcoin's consensus rules, reverse its cryptography, or corrupt its blockchain.

The potential weakness arose in the system used to generate and protect the credentials controlling the bitcoin.

A Bitcoin wallet does not contain bitcoin

A hardware wallet does not literally store bitcoin inside the device.

Bitcoin remains represented on the blockchain. The wallet helps generate, protect, and use the private keys that authorize transactions on particular addresses.

A recovery phrase, often called a seed phrase, can be used to derive those keys. BIP 39 describes a mnemonic process that encodes computer-generated entropy and converts the mnemonic into a binary seed for deterministic wallets.^[3] Its security depends heavily on unpredictability. A properly generated seed should be infeasible for an attacker to guess.

If the process that generates the seed produces materially less randomness than expected, the pool of possible seeds can shrink to something far smaller than users reasonably believed—small enough that a capable attacker might be able to search it and derive the corresponding keys without ever touching the victim's physical device.

A transaction made with those keys may still be valid from Bitcoin's perspective. The blockchain does not know whether the person signing had lawful authority, stole the seed, exploited a vulnerability, or breached an agreement.

Bitcoin validates signatures. It does not adjudicate ownership disputes. The legal system must address the rest.

The relevant system is larger than the device

Serious Bitcoin owners should avoid treating a hardware wallet as a complete security strategy.

The actual custody system may include:

• the device and its components;
• firmware and software;
• random-number generation;
• the process used to create the seed;
• backups and passphrases;
• companion apps;
• transaction-signing procedures;
• vendors and service providers;
• employees, family members, trustees, or advisers;
• physical storage locations;
• succession and emergency-access plans; and
• contracts allocating risk among the participants.

A failure at any one of these layers may defeat the larger system.

This matters even more for businesses and family offices. An individual owner may accept a particular degree of technological risk for personal holdings. A fiduciary, chief financial officer, trustee, investment manager, or family-office executive may have additional obligations to investigate, document, monitor, and respond to that risk.

When a security product fails, legal questions follow

A reported vulnerability does not automatically establish negligence or legal liability.

A viable claim generally requires a careful look at:

• the specific product and firmware version;
• what representations were made;
• the contracts governing the relationship;
• what caused the loss;
• the owner's own conduct;
• what warnings were provided; and
• what defenses may be available.

Depending on the facts and applicable law, the issues may include:

• negligent design or testing;
• failure to warn;
• breach of express or implied warranty;
• negligent misrepresentation;
• breach of contract;
• product-liability principles;
• consumer-protection statutes;
• enforceability of disclaimers and damage limitations;
• comparative fault;
• causation;
• mitigation; and
• calculation of legally recoverable damages.

Additional parties may also be relevant. A loss might involve a manufacturer, distributor, custody provider, software developer, consultant, employee, insurer, or another participant in the custody arrangement.

The existence of a technical defect is therefore the beginning of the legal analysis, not the end.

The first response can shape the case

Owners who suspect a digital-asset loss should resist the instinct to immediately reset, discard, or reconfigure every affected device.

Moving what's left may be urgent, but preserving evidence can be just as important, and the two objectives need to be coordinated carefully.

Relevant evidence may include:

• the original hardware;
• the firmware version in use when the seed was generated;
• serial numbers and packaging;
• purchase records;
• wallet configuration;
• address and transaction history;
• screenshots and photographs;
• logs;
• communications with the manufacturer or service providers;
• internal policies;
• insurance notices; and
• a precise chronology of discovery and response.

An uncoordinated firmware update, factory reset, disposal, or attempted recovery can alter evidence needed to prove what occurred.

Legal counsel and qualified forensic professionals should therefore be involved early when the value or institutional significance of the loss warrants it.

Self-custody does not mean legal isolation

Bitcoin was designed to permit ownership without depending on a central financial intermediary. That does not mean every product and service surrounding Bitcoin operates beyond ordinary legal principles.

Businesses still make representations. Manufacturers still sell products. Developers still write code. Vendors still enter contracts. Fiduciaries still owe duties. Insurers still issue policies. Courts still decide disputes over ownership, responsibility, and damages.

Coldcard itself illustrates the point. Coinkite markets the device as Bitcoin-only, with air-gapped signing options, dual secure elements, and firmware it describes as verifiable and open source.^[4] Those are specific, marketable claims, and specific claims can carry legal weight.

The licensing history adds nuance. Before November 2020, the repository's license identified the firmware as GPLv3-or-later software. A November 18, 2020 commit added an MIT-plus-Commons-Clause license that withholds the right to “Sell” the software as that term is defined in the license.^[5][8][9] That history makes “verifiable” and “open source” distinct representations. Whether a public description fairly conveys the distinction, whether a buyer reasonably relied on it, and whether any representation caused or contributed to a loss are fact-specific legal questions.

The Coldcard incident is therefore not evidence that Bitcoin itself failed. It is evidence that even a security-conscious Bitcoin owner remains dependent on a combination of code, hardware, people, procedures, and legal relationships.

The better question is not simply whether a wallet was “hacked.”

The better questions are:

• What component failed?
• Why did it fail?
• Who controlled that component?
• What representations were made?
• What precautions were reasonable?
• What evidence remains?
• Who should bear the resulting loss?

Those are technical questions.

They are also legal questions.

Attorney Advertising. This article is provided for general informational purposes only and does not constitute legal or cybersecurity advice. Reading or responding to this article does not create an attorney-client relationship. Legal rights and obligations depend on the particular facts, contracts, jurisdictions, and applicable law.