Although the FCA’s rules technically changed on 8th October, a self-inflicted delay meant the regulator didn’t approve any crypto ETNs until this week.

As of today, you can buy the WisdomTree Physical Bitcoin (WXBT:LSE) ETN in a Stocks & Shares ISA on Trading212 (and likely a few other brokers — I haven’t checked). Of course, this isn’t the same as holding actual Bitcoin, but it does mean you can completely avoid capital gains tax, since any returns within an ISA are tax-free.

So, if you’re comfortable taking on a small amount of counterparty risk, holding a small slice of your long-term stack in a reputable, physically backed ETN inside an ISA could be a smart way to reduce your future tax burden.

One final gotcha: presumably out of concern that it hasn’t made UK savers’ lives difficult enough already, HMRC is threatening to revoke the ETN’s eligibility for Stocks & Shares ISAs next April, restricting it instead to the “Innovative Finance ISA” - a zombie product that almost no broker supports. I’ve heard through the grapevine that many brokers are coordinating a protest against this absurdity, so I’d put money on that decision being reversed before April.