The California Crypto Graveyard: What Happens When Digital Wealth Dies With Its Owner

A widower calls Ridley Law six weeks after his wife’s death. She traded cryptocurrency for years, logging in from a laptop that now sits in evidence of nothing but a forgotten password. He knows there is a Coinbase account. He suspects a hardware wallet in a desk drawer holds more, a device the size of a USB stick with a screen he has never turned on. He does not have the twelve or twenty-four word recovery phrase. Nobody does. Whatever value sits behind that screen is, as far as California probate law is concerned, an asset of the estate. As far as the blockchain is concerned, it may already be gone.

This scenario is not rare, and it is getting less rare every year. Crypto ownership has moved from a hobbyist niche to a mainstream position held by tens of millions of Americans, and every one of those holders will eventually die holding it. Most have done nothing to make sure anyone else can get to it. This article lays out the scale of the problem, the California statutory framework that governs what a fiduciary can and cannot recover, the practical mechanics of pulling crypto out of hardware wallets and exchange accounts after death, the tax consequences that follow, and the trust structures that actually solve the problem instead of just describing it.

The Scale of the Problem

Blockchain analytics firm Chainalysis has published widely cited research estimating that somewhere between roughly 17% and 23% of all bitcoin in existence, commonly rounded to “about a fifth,” is lost or otherwise permanently inaccessible. Chainalysis built that estimate by treating bitcoin held in addresses that have shown no outbound activity for five or more years as presumptively lost, on the theory that even patient long-term holders eventually move coins for some reason. Applied to bitcoin’s roughly 19.8 million mined supply, that range translates to somewhere in the neighborhood of 3 to 4 million coins sitting behind forgotten passwords, destroyed hard drives, and, significantly for this discussion, in the estates of people who never told anyone how to get to them.

Not every lost coin is a death case. Some are early miners who threw out old laptops, some are people who simply misplaced a seed phrase while still alive. But death is a major and growing contributor, and the mechanism is structural rather than incidental: cryptocurrency was designed from the ground up to have no central authority who can reset a password or verify an heir’s identity against a driver’s license. A bank can look up a decedent’s account by Social Security number and freeze it pending probate. A self-custodied Bitcoin wallet cannot be looked up by anyone. If the private key is gone, the asset is gone, permanently and by design.

Scale that to California. Federal Reserve survey data on consumer finances put crypto ownership among U.S. adults at roughly 10% as of late 2025, up from about 7% the year before, while industry-run surveys from groups like the National Cryptocurrency Association and Security.org report figures closer to a quarter of adults, depending on how loosely “ownership” is defined. Even using the more conservative Federal Reserve figure against California’s adult population of roughly 31 million, that implies somewhere on the order of 3 million Californians hold cryptocurrency today. Applying the Chainalysis loss ratio as a rough proxy, and treating death as one driver among several causes of permanent loss, the plain conclusion is that a meaningful and rising share of California estates now contain crypto, and a meaningful share of that crypto is at real risk of vanishing the moment the owner dies without a plan. This is not a hypothetical corner case. It is a recovery and administration problem that every California fiduciary needs a framework for, because digital asset estate planning that ignores crypto is no longer complete estate planning.

California’s Legal Framework: RUFADAA

California adopted the Revised Uniform Fiduciary Access to Digital Assets Act in 2016, codified at Cal. Prob. Code §§ 870 through 884, effective January 1, 2017, and subsequently expanded by Senate Bill 1458, which took effect in January 2025 and broadened the definition of “fiduciary” to reach conservators and agents under a power of attorney in addition to personal representatives and trustees. RUFADAA is the statutory bridge between California probate law, which assumes a fiduciary can marshal and inventory estate assets, and federal privacy law, which was written to keep exactly that kind of access from happening without consent.

The Priority Ladder

RUFADAA establishes a three-tier hierarchy for who controls access to a decedent’s digital assets, including crypto exchange accounts. First, if the platform offers an online tool letting the user designate a legacy contact or specify what happens to the account after death, that designation controls and overrides anything in a will or trust. Second, if no such tool exists or was never used, the terms of a will, trust, or power of attorney govern. Third, absent either, the platform’s own terms of service fill the gap, and those terms are frequently silent or hostile to fiduciary access. Very few crypto exchanges currently offer a legacy-contact tool at all, which means for most crypto holders, tier two, the estate planning documents, is doing all the work. A trust or will that says nothing about digital assets, or that predates the client’s crypto holdings, leaves a fiduciary defaulting to whatever the exchange’s terms of service happen to say.

Catalogue Versus Content

RUFADAA draws a sharp line between the “catalogue” of electronic communications, meaning metadata such as sender, recipient, date, and subject line, and the “content” of those communications, meaning the actual substance. Custodians can generally disclose catalogue information to a fiduciary with baseline documentation. Content is different and is governed by the Stored Communications Act, a federal statute that treats disclosure of message content as presumptively off limits unless the user affirmatively consented, whether through a platform tool, a will, or a power of attorney that specifically authorizes it. This distinction matters less for a Bitcoin wallet address than it does for the emails and text threads a fiduciary often needs to even locate the crypto in the first place. If Mom’s crypto holdings are documented only in an email thread with an accountant, and the estate plan never authorized content access, a fiduciary can hit a wall on the very evidence needed to find the asset, separate and apart from any question of accessing the wallet itself.

Custodian Obligations and Limits

Once a fiduciary makes a valid request under RUFADAA, backed by a certified death certificate, letters testamentary or letters of administration, and, for content requests, the specific authorizing language, the custodian generally must respond within 60 days or provide a reason for refusal. A custodian is not required to disclose an asset if doing so would violate other law, and California’s version of the statute does not compel a custodian to hand over the equivalent of a password or private key, only to provide access consistent with what the account terms and the statute allow. Crypto exchanges are custodians of the crypto itself, unlike email providers, which makes RUFADAA directly relevant to unlocking exchange-held holdings, but it does nothing for a hardware wallet, because there is no custodian on the other end to serve a request on. That gap is the reason self-custodied crypto and exchange-held crypto require two entirely different recovery playbooks, discussed next.

Hardware Wallets Versus Exchange Accounts: Two Different Recovery Paths

Self-Custody: Hardware Wallets and Seed Phrases

A hardware wallet, commonly a Ledger or Trezor device, does not store cryptocurrency the way a bank vault stores cash. It stores the private key that proves ownership of coins recorded on the blockchain. The device itself is nearly irrelevant; what matters is the seed phrase, a sequence of twelve or twenty-four common English words generated when the wallet was first set up, from which the private key and every derived address can be mathematically reconstructed on any compatible wallet software, on any device, anywhere in the world. Whoever holds the seed phrase holds the crypto, full stop, regardless of what any will or court order says.

This has two implications for estate planning. First, there is no institution to petition, no customer service line to call, and no probate court order that reconstructs a lost seed phrase. If it is gone, so is the crypto, permanently. Second, and just as dangerous, whoever finds the seed phrase while the owner is alive, or after death but before a fiduciary is appointed, can move the funds immediately and untraceably back to the original owner, with no way to distinguish a legitimate heir from an opportunistic house cleaner or predatory relative. A seed phrase is a bearer instrument in the truest sense.

Some hardware wallet owners use Shamir’s Secret Sharing, a cryptographic scheme, supported natively on newer Trezor devices, that splits a seed into multiple shares, requiring a threshold number, for example three of five, to reconstruct the original. Used correctly, that lets an owner distribute shares to a spouse, an adult child, and an attorney, so no single share is exploitable and no single point of failure exists, while still allowing recovery if the owner dies. It is a meaningful improvement over a seed phrase on a sticky note, but it is not something most clients set up on their own, and it needs to be documented and coordinated as part of the estate plan, not left as an ad hoc arrangement nobody but the decedent understood.

Exchange Accounts: A Different Process for Each Platform

Custodial exchange accounts, where the exchange holds the private keys on the customer’s behalf, work more like a traditional financial account and are reachable through RUFADAA-style estate documentation, but each major platform runs its own process, with its own paperwork and its own delays.

Coinbase routes deceased-account claims through a dedicated Executor Services process, reachable through the Coinbase Help Center or by phone. It requires a certified death certificate, probate documentation appropriate to the estate, such as letters testamentary, letters of administration, an affidavit for collection of personal property, or a small estate affidavit, and government-issued photo identification for the person claiming access. Coinbase does not currently allow customers to name a beneficiary on an individual account, so absent a trust holding the account, access runs entirely through probate or California’s small estate procedures.

Kraken requires the estate representative to contact Kraken’s compliance team directly and supply a full-color image of an official death certificate, not a funeral home issued copy, legal documentation of appointment as estate representative, and current government-issued photo identification. Kraken explicitly advises customers, while alive, to record their account’s public account ID in their will or trust so a fiduciary can identify the account without having to search blindly. Like Coinbase, Kraken does not currently offer beneficiary designations on standard accounts.

Gemini requires a death certificate and documentation establishing the requester’s authority, whether as executor, administrator, or agent under a power of attorney, before it will process a transfer out of a deceased customer’s account. Gemini also offers institutional custody services with estate planning features for larger holdings, including insurance coverage, that a family’s estate attorney can coordinate with directly.

Every one of these processes shares a common vulnerability: they all depend on someone knowing the account exists in the first place. Unlike a brokerage account that generates a 1099 or a bank account that sends a monthly statement to a known address, exchange accounts often exist only inside a password manager or an email inbox the fiduciary may or may not be able to access. This is precisely why a trust funding tracker that inventories crypto accounts, exchange names, and general holding categories, without ever recording actual passwords or seed phrases in the document itself, is not optional paperwork. It is the only thing standing between a fiduciary who knows where to look and one who is guessing.

Tax Complications at Death

The tax side of crypto in an estate is governed by ordinary property tax principles, but crypto’s history of extreme price volatility and incomplete recordkeeping makes those ordinary rules unusually hard to apply cleanly.

IRS Notice 2014-21 established, and subsequent guidance including Revenue Ruling 2023-14 has reaffirmed, that virtual currency is treated as property for federal tax purposes, not as currency. That single classification decision drives everything downstream: sales, exchanges, and even certain uses of crypto trigger capital gains or losses measured against the holder’s basis, exactly as they would for stock or real estate, and staking rewards or other crypto received as compensation are taxed as ordinary income at fair market value when the taxpayer obtains dominion and control over them, per Revenue Ruling 2023-14.

At death, IRC § 1014 gives crypto the same benefit it gives every other capital asset: a step-up in basis to fair market value as of the date of death, or the alternate valuation date if the executor elects it. For an heir who receives bitcoin the decedent bought years earlier at a fraction of today’s price, that step-up can eliminate enormous embedded capital gains entirely, a significant planning advantage over lifetime gifting, which carries over the donor’s original basis instead. The catch is proof. Establishing fair market value for a specific coin at a specific date requires a documented, timestamped valuation, and establishing what the decedent’s original basis even was, which matters for any partial sales before the step-up date and for state-level reporting, requires records that crypto holders notoriously fail to keep. A decedent who moved coins across three exchanges and two hardware wallets over a decade may have left behind no clean chain of custody at all, and reconstructing one after death, from a fiduciary’s side, with no login access, ranges from difficult to impossible.

There is also a reporting dimension fiduciaries frequently miss. Once crypto passes into a trust or estate and is later sold by the trustee or personal representative, that sale is a taxable event reportable on the trust’s or estate’s own return, a topic where far too many successor trustees discover, well into administration, that they had ongoing income tax obligations they never anticipated. That is exactly the gap covered in our companion piece on trust tax returns, and it applies with particular force to crypto because valuation and basis questions are so much messier than they are for a jointly titled brokerage account.

Trust Structures That Actually Work for Crypto

Naming crypto in a trust document accomplishes almost nothing on its own. The document can say “all cryptocurrency held by the Trustor is trust property” in perfect legal form, and the crypto will still be permanently unreachable if nobody funded the trust in the operational sense, meaning nobody actually transferred custody or access to the trustee. This is the single most common and most catastrophic mistake in crypto estate planning, and it is a specific instance of the broader funding your trust problem that undermines otherwise well-drafted living trust plans across every asset class, just with far higher stakes for crypto because there is no recovery mechanism after the fact.

The Seed Phrase Custody Problem

Funding a trust with real estate means recording a new deed. Funding a trust with a bank account means retitling it. Funding a trust with self-custodied crypto means the trustee, current or successor, needs a way to actually control the private keys when the time comes, without the seed phrase sitting in a place so obvious that it defeats the entire purpose of self-custody while the owner is alive, and without it being so obscure that nobody can find it when the owner dies. Writing a seed phrase directly into a trust document is a bad solution twice over: trusts frequently become discoverable in litigation, are shared with beneficiaries and their counsel, and in some circumstances are filed with a probate court, none of which should ever have a bearer instrument for six or seven figures of crypto sitting inside them in plain text.

Better approaches separate the instruction from the secret. The trust or a coordinated letter of instruction identifies that hardware wallets exist, roughly what they hold, and where a sealed, physically secured item can be found, such as a bank safe deposit box or a fireproof safe, while the seed phrase itself lives only in that sealed, physical location, updated by the client directly rather than transcribed by counsel into a document.

Multi-Signature Wallets

A multi-signature, or “multisig,” wallet requires more than one private key to authorize a transaction, for example two of three or three of five. Structured properly, a multisig arrangement can mirror a trust’s own governance: the trustor holds one key, a successor trustee or trusted advisor holds a second, and a third sits in secure cold storage as a backup, so no single compromised key or single incapacitated person can move funds, but a defined threshold of legitimate parties can. This is a meaningfully stronger structure than a single seed phrase with no redundancy, and it is increasingly the recommended approach for any crypto holding large enough to justify the added operational complexity of key management across multiple parties.

Institutional Custody Services

For substantial holdings, qualified custodians such as Anchorage Digital and BitGo offer institutional-grade custody built specifically around governance, multi-party approval, and integration with fiduciary and trust administration, rather than the consumer-facing model of a retail exchange account. These services are generally aimed at holdings large enough to justify their fee structures, but for a trust holding a meaningful crypto position, routing custody through a regulated institutional custodian solves the seed-phrase problem entirely: the successor trustee steps into a documented, auditable custody relationship instead of hunting for a hardware wallet in a desk drawer. Whoever is named to handle successor trustee duties should know, before they ever have to act, whether they are inheriting a self-custody problem or an institutional relationship they can simply call.

What to Do Now

If you hold cryptocurrency and live in California, the gap between what your estate plan says and what actually happens after your death is almost certainly wider than you think. A handful of concrete steps close most of it.

Inventory everything, in one place, updated regularly. Every exchange account, every hardware wallet, and a general description of holdings, without recording passwords or seed phrases in that inventory itself. A trust funding tracker built for this purpose keeps the inventory current without turning it into a security liability.
Fund the trust for real. Retitle exchange accounts into the trust’s name where the exchange permits it, and establish an actual custody transfer plan for self-custodied holdings, not just a sentence in the trust document asserting ownership.
Separate instructions from secrets. Keep the “what and where” in your estate plan and the “how,” meaning the seed phrase itself, in a physically secured location controlled and updated only by you, or transferred to institutional custody.
Use platform legacy tools where they exist, since RUFADAA gives those platform-level designations priority over your will or trust, and coordinate them with your estate planning documents rather than treating them as a substitute.
Consider multisig or institutional custody for larger holdings, where the operational overhead is justified by eliminating a single point of failure.
Keep basis records, meaning acquisition dates and purchase prices, so your executor or trustee can actually substantiate the step-up in basis under § 1014 instead of guessing at it after you are gone.
Talk to your estate planning attorney specifically about crypto, not as an afterthought folded into a general asset list, because the recovery mechanics, tax treatment, and trust funding steps are different enough from traditional assets that generic planning language will not cover them.

Crypto does not behave like the other assets your estate plan was built to handle. There is no bank to call, no court order that reconstructs a forgotten password, and no institution obligated to make you whole when a seed phrase is lost. The blockchain does not care about probate deadlines, and it will not make an exception for a grieving spouse. The legal framework in Cal. Prob. Code §§ 870-884 gives fiduciaries a real path to exchange-held crypto, and IRC § 1014 gives heirs a real tax advantage on what they inherit, but neither of those provisions does anything for an asset nobody can find or unlock. That part is still entirely on the owner, while the owner is still alive to fix it.