Crypto trading was mentioned at an AMA earlier this year, info here —> Community Meetup - 8 PM Wed 12th May 2021, live on Zoom - #78 by jspen
It will require a bit of a shift for the business model which has been engineered to create a long term relationship with customer through recurring ‘membership’ for the ISA & SIPP. It’ll probably be first with crypto ETF’s but not sure if they’ll be considered ISA eligible so could be GIA only.
The winner takes most as far as FT are concerned would be competing with the likes of Trade Republic, BUX, T212 & e-toro (probably more but I can’t think of them right now).