As much as I think we are worse off for leaving the EU, I can't help but think that everyone getting freaked out over the markets is over-reacting.
OK, it is bad, but it's because the market absolutely didn't expect this result and is re-adjusting to a more appropriate level (probably around £1.30~to the $) and people are moving their stocks out of things like house-building and into more long-term protected stuff like healthcare.
We need leadership to come in and help us through this, but as I said on ref night, the fundamentals of the UK economy are strong.
Before this we were the fastest growing developed economy in the world, we haven't suddenly got absolutely shite at business, it's just a shock event which is having consequences play out.
For reference, I think this crisis will have an effect on the UK economy more like 9/11 did on the US's markets rather than 2008 - but I'm not an expert so we will see.