As Europe, the UK and US are economically tied together in a comical 5-legged race it is hard to tell how the currencies are performing in absolute terms. I find the Bitcoin-to-GBP rate is an interesting chart to watch as it isn't (shouldn't be) too tied to any one nation or event.

http://www.xe.com/currencycharts/?from=XBT&to=GBP&view=1Y

That said, in the month before the referendum the pound weakened against BC by about 50%. The next 10 years are going to be... difficult.