UK risks crypto "sakoku" as FCA rules threaten to wall off the country

A Regulatory Perimeter That Could Shut Out the World

The Solana Research Institute (@Solana_SRI) has raised the alarm over the UK's approaching cryptoasset regime, arguing that the rules as currently drafted will make basic blockchain participation commercially unviable for firms operating in the country. The warning arrives as the clock ticks toward a hard deadline: the FSMA Cryptoassets Regulations 2026 introduce a full licensing regime for the first time, marking a shift away from the temporary registration model, with full enforcement set for October 2027.

The institute draws a striking historical parallel, likening the UK's approach to Japan's 17th-century "sakoku" isolation policy. The concern is not the principle of regulation itself, but its scope. Under the proposals, delegated and liquid staking would fall under FCA oversight even where stakers' assets never leave their own wallets. Non-custodial wallet providers could also be caught simply by offering transaction-signing software.

Validators and node operators face particular exposure: the FCA has warned that those involved in such activities will lose their pure technology exemption the moment they offer "added value" features, including user dashboards, yields, or reward-compounding tools, at which point they must seek full approval for arranging staking.

The stablecoin picture is equally restrictive. The UK's exemption covers only UK-authorized stablecoins, leaving $USDC and $USDT, as well as virtually every other major stablecoin in active use, outside its protections. For stablecoin issuers, the FCA considers issuance legal only if the issuer is established in the United Kingdom and manages the entire lifecycle, from initial offering through to redemption and reserve maintenance.

The Cost of Compliance Could Price Out Mid-Tier Operators

The Solana Research Institute puts concrete numbers on the burden. A mid-tier Solana validator earning between $250,000 and $400,000 annually would face $70,000 to $170,000 in one-off authorization costs, plus ongoing compliance expenses equivalent to 15 to 30 percent of annual revenue. For many operators, that arithmetic simply does not work. The more likely outcome, the institute argues, is that overseas providers geofence UK users rather than register with the FCA.

For crypto firms headquartered outside the UK that market services to UK retail customers, the FCA's overseas firm provisions mean that the authorization requirement applies regardless of where the firm is incorporated. That gives international operators a binary choice: absorb the compliance cost or exit the UK market entirely.

The contrast with peer jurisdictions is pointed. The EU, Switzerland, and the US all exempt non-custodial staking from equivalent regulatory requirements. The UK, by treating the same activity as a regulated service, risks creating an isolated market that global participants choose to avoid rather than navigate.

The FCA has invited views on its perimeter guidance proposals, with responses due by 3 June 2026, and intends to publish final rules in policy statements this summer. For the industry, that consultation window is the last meaningful opportunity to push back before the framework is locked in.

Sources:
FCA CP26/13: Cryptoasset Perimeter Guidance (FCA.org.uk)
Final UK Crypto Rules Are Expected in 2026 (Skadden)
FCA Releases Finalized Cryptoasset Rules (CoinDesk)