The real question to be asked is whether the prediction of economists is all that relevant.
They did not see the crash of 2008 coming. Their policies were the cause of it. Likewise, doom-and-gloom expressed by economists about Brexit is correlated to the consequential outcome and predictable fear by stock traders (the experts of “short”). The ability of stock traders to see the bigger picture, the “long” over the aberrations of “short,” is even more hampered.
So, thou shall not be swayed by those who do not understand the fabrication of freedom the EU was trying to make the UK submit to. The UK just released itself from a horrifying submission to oligarchic and totalitarian freedom of Europe. Leaving the lame-ducks of Europe behind:
“None are more hopelessly enslaved than those who falsely believe they are free.” — Goethe
The pursuit of a plurality of freedom has prevailed in this referendum, and the uncertainty that comes with it is a necessary ingredient to embarking on a brave new world.