BlackRock is preparing to list its iShares Bitcoin ETP (BTCN) on the London Stock Exchange to coincide with an FCA rule change. | Credit: SOPA Images / Getty Images. Key Takeaways An impending FCA rule change will let retail investors in the U.K. access crypto exchange-traded notes. ETNs differ from ETFs, which are required to diversify their portfolio under European regulation. Bitwise, WisdomTree, and 21Shares currently list Bitcoin ETNs on the London Stock Exchange, but only for qualified investo ...