The definition of sacrifice: "give up (something valued) for the sake of other considerations." So the idea that, for example, Russians who gave up their lives to defend their country did not make a sacrifice is totally nonsense.
I can't believe that point even needs to be made.
A Master's degree in economics, a thesis on currency trading and market fluctuations and several years working in the City. Whilst it's not a total guarantee that the markets will suffer long term, it is very likely if you ask the vast, vast majority of those with decent experience of watching...
Nothing has actually changed yet though, which is why the market has bounced back after the news of the result. Once we actually invoke Article 50, and the details of what leaving the EU actually means you will see the markets fall pretty drastically again, with no guarantee that they'll come back.