Crypto exchange-traded notes: rules, risks and ISAs

Crypto exchange traded notes, usually called crypto ETNs or cETNs, are investments you can buy on the stock market that follow cryptocurrency prices, such as Bitcoin or Ethereum¹. The rules around them changed in April 2026: they can no longer be bought in a stocks and shares ISA, and they now qualify only for an innovative finance ISA². Anything you already held in a stocks and shares ISA before 6 April 2026 can stay there².

They are treated as a very high risk investment. The value of the underlying cryptoasset can drop as quickly as it can rise, and if the organisation that issued the ETN went bust you could lose some or all of your money³. Most cryptoassets are not regulated by the FCA, which means they are not protected by the Financial Services Compensation Scheme (FSCS)⁴.

Crypto ETNs have moved from stocks and shares ISAs to innovative finance ISAs

From 6 April 2026, the ISA rules were amended so that crypto ETNs are a qualifying investment for an innovative finance ISA (IFISA) and are no longer eligible for a stocks and shares ISA². Which? confirms the change: as of 6 April 2026, crypto ETNs, funds that invest in cryptocurrencies, can be held in IFISAs³. One platform stopped offering them in an ISA from 1 April 2026⁴.

Existing holdings get transitional treatment. Crypto ETNs held in a stocks and shares ISA or Junior ISA before 6 April 2026 can remain within the account². You simply cannot add new ones there. Crypto ETNs also cannot be held in a Child Trust Fund⁶. If you want to keep buying them, you can still do so in a general investment account (GIA)⁴, or through an IFISA, the ISA type originally set up for peer-to-peer lending and crowdfunding⁷.

You can transfer money already in a cash ISA or stocks and shares ISA to an innovative finance ISA³. Note that IFISAs are a different wrapper from the stocks and shares ISAs most investors know, and the investments they hold, such as crowdfunding, open ended property funds and crypto ETNs, carry their own risks³.

What a crypto ETN is and how it tracks crypto prices

A crypto ETN is a type of ETN that tracks the price of a specific cryptocurrency, such as Bitcoin or Ethereum⁸. It trades like a share on the London Stock Exchange during market opening hours⁹. Unlike the underlying cryptocurrency, which trades around the clock, cETNs can only be traded during market hours⁸.

The legal definition in the 2026 legislation describes a UK cryptoasset exchange traded note as a debt security traded on a UK trading venue or a market operated by a UK recognised investment exchange, with no periodic coupon payments, whose return tracks the performance of an unregulated transferable cryptoasset minus applicable fees¹⁰.

The key point is what you actually own. A physical ETF owns the underlying securities of the index it tracks, whereas an ETN works like a bond issued by a financial organisation that pays out the return of the index over a period of time¹¹. ETNs do not necessarily give you ownership of the securities, or in this case the coins, from the index¹¹. One platform notes that because the underlying cryptocurrency is held by a regulated custodian, no wallet or private keys are needed¹.

Crypto ETN risks: volatility and possible total loss

Crypto ETNs are a very high risk investment, and the FCA considers them high risk due to the potential for losses⁴. The performance of most cryptoassets can be highly volatile, with their value dropping as quickly as it can rise⁴. There is also a risk of losing money through cyber-attacks, financial crime and firm failure⁴.

The structure adds a second layer of risk on top of the price. If the organisation behind the ETN goes bust, you would lose some or all of your investment³. This is one of the biggest risks of ETNs generally: if the issuer were to go bankrupt, the investor could lose all of their investment¹¹. A similar counterparty risk applies to synthetic ETFs, where the collapse of the counterparty company could mean losing some or all of your investment⁸.

In practice, that means two things have to go right: the cryptocurrency price has to perform, and the issuer has to stay solvent. Independent guidance is blunt that crypto ETNs should only be held by people with a good understanding of how crypto works³. Investment is also not suitable as a way to get out of debt¹².

Where FSCS and ombudsman protection may not apply

This is where crypto ETNs differ sharply from mainstream investments. FSCS states that crypto assets are virtual currencies and not FCA regulated, which means they are not FSCS protected⁵. The FSCS also confirms that most cryptoassets are not protected because they are not regulated, including virtual currencies like Bitcoin and Litecoin¹³. One provider states plainly that the FSCS does not protect this type of investment because it is not a type of investment the FSCS can protect⁴.

The same gap extends to dispute resolution. Because most cryptoassets in the UK are not regulated like other financial products, you could lose all your money and may not be protected by the Financial Ombudsman Service or the FSCS if something goes wrong¹⁴. Bitcoin and all other crypto are listed among unregulated investments in guidance on your rights as an investor¹⁵.

Where the ombudsman does get involved, outcomes vary. In one published case, a customer complained about a cryptocurrency investment scam, and her bank argued that she had not suffered a financial loss by making payments to her own cryptocurrency account, saying she should pursue the crypto exchange instead¹⁶. That illustrates how hard it can be to establish who is responsible when things go wrong.

Tax on crypto gains held outside an ISA

Holdings inside an ISA are sheltered from the usual investment taxes, but crypto held outside that wrapper is not. Capital Gains Tax can apply to shares or investment funds held outside an ISA or pension¹⁷, and HMRC says Capital Gains Tax may apply when an individual disposes of cryptoassets, such as selling or exchanging them for a different asset¹⁸. Income Tax and National Insurance may apply to cryptoassets received through employment, self-employment, mining, staking or lending¹⁸.

For comparison, Capital Gains Tax can also apply when you sell a personal possession for £6,000 or more¹⁹, or when you make a gain on property that is not your home, such as buy-to-let properties, business premises or land²⁰. The treatment of a crypto loss depends on context: for benefits capital rules, cryptocurrencies such as Bitcoin are treated in the same way as other investments, and you need evidence of the current value, such as a screenshot of your crypto wallet²¹.

Crypto adverts: the risk warnings they carry

Since 8 October 2023, firms promoting cryptoassets in the UK must be authorised or registered by the FCA, and their promotions must be clear, fair and carry risk warnings²².

The absence of a sign-up bonus matters too. Incentives to buy before a specific deadline, and minimum order levels, can be a sign of a scam²³. Age UK lists the same pattern: pressure with a time-limited offer, for example a bonus or discount if you invest before a set date²⁴. Crypto investment offers on social media are high risk and are often used in fake adverts, cloned firm scams and celebrity endorsement scams¹⁴.

Other warning signs include aggressive, opaque or unrealistic approaches²³, pressure to act quickly, lack of information, lack of regulation, fake endorsements and poorly designed websites²². MoneyHelper adds a basic rule: a common warning sign is being contacted unexpectedly about an investment opportunity, because legitimate firms will not contact you out of the blue²⁵.

Where to get help

Before investing, check the FCA list of unauthorised businesses, which shows firms suspected of fraud and is updated often²². For UK companies, check whether the company registration number is clearly stated so you can look the firm up on Companies House²³. If you have already paid a firm you now doubt, contact your bank straight away and report the matter: the Take Five campaign and MoneyHelper both publish guidance on investment and crypto scams¹⁴. Free, impartial help is available from MoneyHelper and, for complaints about regulated firms, the Financial Ombudsman Service. For the wider picture on digital coins and the rules around them, see cryptoassets: the rules and your protection, and for the ISA types mentioned here, ISAs: a complete guide.