More Bitcoin now sits outside exchanges, and courts cannot move those coins without keys.
That custody shift is colliding with family law. Exchange balances hover near multi-year lows at roughly 14–15% of circulating supply, about 2.7–2.8 million BTC.
The rest sits with institutions in vaulted custody or in personal wallets where a 12–24 word seed phrase confers control. In divorce, the legal system can divide what it can prove exists or compel to appear, yet self-custody alters those mechanics.
Courts can order disclosure, and refusal risks contempt or adverse financial awards, but a judge cannot broadcast a Bitcoin transaction without the private keys.
How courts are adapting to crypto’s self-custody reality
Law is moving to recognize what the technology already made possible. In England and Wales, the Property (Digital Assets etc) Act 2025 received Royal Assent, codifying that certain digital assets can attract property rights.
The Law Commission’s “data objects” concept underpins that shift. Recognition matters for injunctions, tracing, and title, yet it does not conjure keys.
UK courts have already granted proprietary injunctions over crypto in fraud contexts, as Norton Rose Fulbright documents, and that toolkit is now available in more routine disputes where assets are found.
Family lawyers in the UK and US, including firms like Kabir Family Law, describe playbooks that start with bank and tax records, move to exchange subpoenas, fold in on-chain heuristics and device logs, and end with lifestyle evidence when the ledger is silent.
Ownership is no longer fringe. The UK Financial Conduct Authority reported about 12% of UK adults held crypto as of August 2024, roughly 7 million people, according to the FCA.
Trade press and private surveys placed adoption higher in 2025, which is directionally useful but not a hard anchor. Even if many holdings are small, the marginal spouse most motivated to conceal will prefer self-custody that evades intermediaries.
For courts, detectability and seizability have split. The analytics stack now rented by subpoenas is more robust when funds touch a KYC platform.
Hardening perimeters and the regulatory outlook
Chainalysis’ mid-year 2025 readout put theft over $2.1 billion and tracked a pivot toward stablecoins in illicit finance, demonstrating how chain data can map flows and counterparties once an exchange or broker is in the path.
That capacity raises detection probability, yet it does not unlock a cold wallet stored offline.
Regulators are tightening the perimeter that can be tightened. In the European Union, MiCA and the Travel Rule staged in through 2024 and January 2025 standardize originator and beneficiary data when transfers pass through crypto-asset service providers.
The United Kingdom has advanced plans to bring exchanges and dealers into formal authorization, adding a supervisory lens to the platforms that most often interact with consumers.
In the United States, broker reporting for DeFi was nullified in April 2025 and broader IRS crypto reporting does not begin until 2026, leaving a patchwork in the near term. These measures harden ramps, not keys.
Two custody modes explain the enforcement gap. Custodial accounts put an intermediary between a person and their coins, so courts can freeze and garnish with platform cooperation.
Self-custody flips that model
A seed phrase deterministically generates keys that unlock transactions, and whoever holds that phrase holds spend power.
Orders to disclose remain binding, and non-compliance can be punished, yet a refusal does not yield immediate recovery. That is the practical difference family barristers have to underwrite in settlement advice today.
The market structure makes the legal math more probabilistic. Exchange balances at multi-year lows point to more wealth that is key-controlled, not platform-controlled.
ETF growth has concentrated another slice in professional custody with multi-party controls. Price targets may rise or fall, but the custody migration is independent of directional calls.
If the off-exchange share of Bitcoin rises a further 2–4 percentage points by end-2026, which would be consistent with recent drawdowns, contested cases involving crypto-active spouses will see a higher incidence of non-compliance and negotiated discounts that price the risk that coins do not return.
Practitioners are already adapting
Typical discovery now runs through bank statements, tax returns for capital-gains traces, exchange subpoenas for KYC files, IP and device logs, and deposit or withdrawal histories, then into on-chain cluster analysis, as described by NJCPA and other practitioner sources.
Where smoke appears but keys do not, judges can draw adverse inferences and reweight other assets, or award maintenance and fees to offset concealment. That mirrors offshore cash dynamics, with the twist that Bitcoin compresses offshore-like control into a memorized phrase that leaves fewer paper trails.
Joint-custody solutions are entering family toolkits. Multisignature wallets, for example 2-of-3 setups, allow shared control by two spouses and a neutral third party.
Commercial providers like Casa, Unchained, and Nunchuk market inheritance and recovery flows, which give solicitors a template for prenups and postnups that route marital acquisitions into a jointly controlled wallet with an executor or law firm as the neutral signer.
The logic is simple: make “ours” a policy embedded in the signing threshold, then have the neutral party act only to execute lawful orders, facilitate agreed distributions, or rotate keys if one is compromised. A small adoption share would still cover hundreds of thousands of UK and US households by 2027, based on the FCA baseline.
Courts and policymakers are also leaning on intermediaries for sanctions enforcement. OFAC has sanctioned exchanges and mixers that enabled illicit flows, the U.S. Treasury noted, and those actions ripple into exchange compliance teams that answer subpoenas faster and with richer metadata.
As that perimeter hardens, expect more evidence sourced from platforms, shorter timelines from subpoena to production, and stricter penalties for non-disclosure.
None of that produces keys for purely self-custodied assets, which is why adverse awards, fee shifting, and contempt become the primary deterrents rather than guaranteed division by transfer.
Some pushbacks deserve a clear response
“Most people keep coins on exchanges” is less accurate with balances below 15% on platforms and with institutional custody growth. “Forensics will make hiding rare” is true only when funds touch a broker or CASP.
“Offshore accounts already let people cheat” is an incomplete analogy because self-custody removes the bank. The 2025 UK Act shows law treating digital assets as property, yet practical control rides on cryptography. Courts can punish non-disclosure, they cannot sign a Bitcoin transaction.
| Metric | Latest reference | Source |
|---|---|---|
| BTC on exchanges | ~14–15% of supply, ~2.7–2.8M BTC | Coinglass |
| UK adult crypto ownership | ~12% (~7M adults) as of Aug 2024 | FCA |
What happens next splits across four paths that practitioners and clients should price. First, keys beat courts, in the sense that a higher off-exchange share raises the rate at which non-cooperation turns into contempt or discounts rather than immediate recovery.
Second, platforms extend the perimeter, as EU and UK rules, and US tax reporting in 2026, raise visibility whenever coins touch a broker. Third, joint-custody norms emerge, with prenups and wills adopting multisig and escrowed key shards so that families can share control and assure inheritance without putting seed phrases in the public record.
Fourth, the forensics arms race continues, improving detection at the ramps while leaving air-gapped storage opaque unless someone cooperates.
The policy lens remains cross-border. Capital controls and sanctions gain leverage through intermediaries, and MiCA’s and the Travel Rule’s data standards create a more uniform paper trail inside the regulated sector.
None of those measures reduces a person’s ability to move value through self-custody across borders. That is why courts will continue to rely on remedies that change incentives, not transactions, and why family solicitors will continue to ask for logs, receipts, and OSINT when the ledger is quiet.
If there is a single line that captures the moment, it is that regulation hardens ramps, not keys.
For divorce courts, that means settlements that assume coins can be found where they touch a platform, and remedies that assume they cannot be moved when they do not.
The keys will decide what can be split.
