How (and why) should a country leaving the EU have an (technology- or financial-based ?) impact on bitcoin ?
I don't see a single scenario where this would have an impact. Even if there was a specific political change which would affect bitcoin, those impacts would only be temporarily.
A small country like the UK can't have a big impact on something which runs all around the world (e.g. internet, bitcoin, ...).
I would be glad to hear your point of view - why and how the brexit could impact anything regarding bitcoin.