Do United Kingdom tax rules allow you to hold Bitcoin in a self-invested pension plan?
Prudential has a list of allowable investments for their SIPP, though I'm not sure if these are industry standard: http://www.pruadviser.co.uk/new_pdf_folder/FRPM10011.PDF
Looks like if they consider Bitcoin a commodity, it will probably not be allowed. But the UK is considering regulating Bitcoin as a currency, which means that you may be able to have it qualify under this rule:
- Deposit accounts in any currency with an EEA authorised deposit taker opened by an appointed investment manager.
Of course it will be hard to fit those standards. It looks like some countries in the EEA do regulate Bitcoins so you may need to open an account with them.