It's hard to stay optimistic when markets crash like this, but I think there are also huge trading opportunities in such a scenario. If the markets rebound then it's game-on! Not only there are great opportunities in the currency markets, but also the commodity and stock markets. Stocks that were heavily affected by the result of the Brexit may then be a lot cheaper, think of British automakers for instance. In the short term I don't think this chaos is far from over, mainly because I expect other countries in Europe wanting to hold referendums soon as well. A Frexit, Nexit next? Perhaps every country in Europe might want to hold their referendum, only causing more economic instability in the (financial) markets.
It's not only the Brexit that is causing turmoil in Europe, today Spain is holding elections as well, the outcome could spark even more volatility. Whatever the case is, chances that the markets rebound tomorrow and the rest of the week is slim to none in my opinion, especially now that there's so much going on. It definitely is not going to blow over in a week, that's why I believe there are a bunch of short opportunities, go short now while you can (in the right trades of course)! Eventually the markets will correct themselves, but until then it's trying to make money with short positions.
Limit your risk, and research trades well before you execute them.
Let's have a profitable week!