Short answer

Crypto inheritance in the US is a real legal area with established (if still-evolving) practice. The high-level path: include crypto in your will, draft sealed instructions for executors covering how to access wallets without exposing keys during life, use a multisig or Shamir-split setup so executors can recover without holding the full key, and consider a specialized service (Casa, Unchained Capital) for accounts with significant value. Avoid "give my children the seed phrase" — it's the worst possible plan.

The legal framework

Most US states follow the Revised Uniform Fiduciary Access to Digital Assets Act (RUFADAA), passed by most states between 2016-2020. RUFADAA gives executors legal authority to access digital assets (including crypto) on behalf of the deceased. State variations apply; California, New York, Texas have slightly different rules.

The legal authority is necessary but not sufficient. The executor needs the technical means: the seed phrase, the hardware wallet, the password to the encrypted backup. RUFADAA doesn't help if the keys are lost.

The practical structures

Tier 1 ($50K-250K). Will + sealed instructions. Hardware wallet in safe-deposit box. Will names the executor and references "see sealed envelope at [attorney's office]" for access instructions. Sealed envelope contains: device location, PIN, seed phrase location, restoration steps. Attorney's office holds the envelope.

Tier 2 ($250K-1M). Multisig with co-signer. 2-of-3 multisig: one key with you, one with attorney/CPA, one in safe-deposit box. After your death, the attorney and the safe-deposit box keys reconstruct without you. Your executor has standing instructions on how to coordinate. Casa offers this as a managed service.

Tier 3 ($1M+). Specialized estate trust. Crypto-specific estate attorney drafts a trust. Trust company (or multi-sig structure) holds custody. Beneficiaries receive distributions per trust terms. Specialized providers: Unchained Capital, BitGo Trust.

The mistakes to avoid

"I'll tell my spouse the seed phrase." The spouse becomes a single point of failure for both theft (coercion, divorce, social engineering) and forgetting. If the spouse predeceases, the children inherit the problem.

"I'll write it in my will." Wills become public documents in probate. Anyone who searches court records can see the seed phrase. Treat wills as the opposite of secret.

"I'll teach my kids how to access it." Teenagers and crypto seed phrases is a known disaster pattern. Wait until they're adults with documented opsec discipline, or use a structure that protects against teenage mistakes.

"My executor can figure it out." Without explicit instructions and access mechanisms, your executor faces an impossible task. RUFADAA gives them legal authority but not technical capability.

The "what if I forget to tell anyone" problem

This is the most common failure mode. Holder dies unexpectedly without ever discussing the crypto. Family doesn't know it exists. Funds locked on-chain forever, eventually inferred lost from the family-discovery process at the wallet device or exchange records.

Mitigation: a sealed envelope with attorney or in safe-deposit box, even if you haven't picked a full estate-planning structure. At minimum, write down: "Crypto wallets exist; see [location]; contact [crypto-savvy friend] for help." The friend doesn't get access — they help your family find the access.

The professional help

Crypto-aware estate attorneys exist in major US metros (NYC, SF, Miami, Austin). Charge $1,500-5,000 for a basic crypto-inclusive estate plan. Worth it for holdings above $100K.

Further reading: Shamir Backup, Multisig.