Don't let your Bitcoin die with you. From sealed letters to multisig inheritance with Casa and Unchained, to legal trusts and BitGo institutional services — every approach explained.
An estimated 3-4 million Bitcoin — worth hundreds of billions of dollars — will eventually be lost forever because holders die without leaving clear instructions for their heirs. The private key is the Bitcoin. No key, no Bitcoin. No exception.
Proper Bitcoin inheritance planning is not optional if you care about your wealth actually passing to your family. This guide covers every approach: from simple seed phrase letters to professional trustee arrangements.
A traditional will says "I leave my Bitcoin holdings to my spouse." That's legally valid — but completely useless if your spouse doesn't know:
Unlike a bank account or brokerage, there is no customer service line. There is no probate court order that unlocks a Bitcoin wallet. The private key is the only key. If your heirs don't have it, the Bitcoin is permanently inaccessible.
Write a sealed letter containing:
Store this letter with your estate attorney or in a fireproof safe. Leave instructions in your will directing heirs to the letter.
Pros: Free, simple, works immediately. Cons: Whoever has the letter has your Bitcoin. Single point of failure. If the letter is found by the wrong person while you're alive, your funds are at risk.
Cipherwill is a service that helps structure this approach digitally — storing encrypted instructions that release automatically if you fail to check in periodically.
A 2-of-3 or 3-of-5 multisig setup where:
Upon death:
Casa — Gold standard for individual multisig inheritance. Their "Sovereign Recovery" plan specifically addresses death scenarios. Includes legal letter templates and guided recovery process.
Unchained Capital — 2-of-3 multisig where you hold 2 keys, Unchained holds 1. Unchained provides a key-release process for heirs with proper documentation. Inheritance protocol is built into their vault service.
Pros: No single point of failure. Heirs cannot steal funds while you live. Professional service validates death before participating. Cons: More setup. Requires hardware wallets. Annual service fees.
A revocable living trust can hold Bitcoin with specific provisions:
Bitcoin Will & Trust (US Legal) — US attorneys specializing in digital asset estate planning. Creates trust language that explicitly addresses cryptocurrency and instructs trustees.
Anthony S. Park PLLC — Leading law firm for digital asset estate planning. Authored the model legislation for uniform treatment of digital assets in US probate law (RUFADAA).
Key trust provisions to include:
Bitcoin in a trust vs. direct inheritance: A trust avoids probate, transfers immediately upon death, and can include conditions (e.g., heirs receive Bitcoin at age 25). Direct inheritance via will goes through probate — a public process that can take months or years.
For large holdings where you're comfortable with qualified custodians:
BitGo Trust Inheritance Services — BitGo operates as a qualified trust company. Can hold Bitcoin in trust with designated beneficiaries. Death triggers a documented transfer process.
Anchorage Digital Estate Services — Anchorage (the OCC-chartered digital bank) offers institutional inheritance planning for high-net-worth clients.
Bitcoin Suisse Inheritance Planning — For European clients, Bitcoin Suisse provides private banking-style inheritance services.
Pros: Institutional oversight, clear legal framework, professional handling. Cons: You're trusting a custodian with your keys (counterparty risk). Fees. Minimum holdings requirements (typically $250k+).
Bitcoin Keeper — Bitcoin wallet with built-in inheritance protocol. Allows designating heirs with time-locked access that activates if you don't check in.
Bitcoin Inheritance Protocol (BIP) — Open-source protocol using Bitcoin timelocks. Bitcoin can be set to become spendable by a backup key after a certain block height if you don't "refresh" the timelock periodically.
Timelock scripts (DIY): Bitcoin's scripting language supports time-locked transactions. Advanced users can create UTXO-level inheritance — a transaction that pays to heirs' addresses but is locked for 1 year, automatically renewable.
Blockstream Green — 2-of-2 with Blockstream holding one key. After 90 days of inactivity, the second key can be used alone — a simple inheritance mechanism for smaller amounts.
Regardless of method, every plan needs:
1. Inventory: List every place Bitcoin exists. Exchanges, wallets, paper wallets, mining payouts, ETF holdings. Heirs who don't know about an account can't claim it.
2. Access instructions: Seed phrases, PINs, passphrases, 2FA backup codes. These must be stored securely but findably.
3. Technical education: Ideally, your heirs practice the recovery process before they need it. A "dry run" where you simulate death teaches them the process while you can answer questions.
4. Trusted person: Someone who can help your heirs navigate the technical complexity. A tech-savvy friend, a Bitcoin-literate attorney, or a professional service.
5. Legal framework: Even the best technical setup needs legal backing. An executor with clear authority to access digital assets (under RUFADAA in most US states) avoids legal challenges.
Paper seed phrases burn, flood, and fade. Metal backups survive:
Blockplate Steel Seed Backup — Stainless steel plates for stamping or engraving BIP39 words. Survives fire and water.
Store the metal backup in a fireproof safe or safe deposit box — separately from the hardware wallet. Never in the same location.
Even if you don't implement a full solution today, do this right now:
This is imperfect. But it's infinitely better than your heirs finding a hardware wallet with no idea what to do.
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