Oddbean new post about login | logout I expect an increased CGT will come into effect immediately if they really do it. Afaik, dropping your British citizenship wouldn't trigger a CGT on Bitcoin holdings unless you also liquidate to dirty fiat at the same time.
I think you’re right about immediate CGT rise implementation. Citizenship would be the last element I’m looking at. While I may or may not leave the UK tax system dependent on the increase in CGT in unrealised assets (kind of an exit tax), I probably won’t renounce my citizenship, rather obtain multiple passports. But all my decisions are monitoring the world situation and are flexible.