Come back in 10 years' time - you might be right, you might be wrong but 2 months is about 118 months too early to conclude anything positive or negative about Brexit.
Suspect this is better judge of how things are:
FTSE 100 is poor statistic to use for anything except how well the FTSE 100 is doing because it includes mainly international companies and is weighted heavily to miners, whose share price a) fluctuates; b) has rock all to do with Brexit.
My best success has been Blackrock Gold and General - up 80% in 6 months. IMO, anyone with significant investments should hold gold in some form (ETF, fund or physical). It earns nothing but it is contra cyclical when things go wrong. Just ignore it when goes south as chances are your other...
There are three key points with the 'it ain't that bad, look at the FTSE' argument:
1. The FTSE is a poor surrogate for the true economy as many others have pointed out;
2. Yes, it may be up now but will it be in a month, year, two years etc. Of course if it goes down, Leavers will blame...