"The economy isn’t going to contract. They’re gonna have years between this vote and actually being out the EU—in which time substitute trade deals will be in place."An alternative trade deal with the EU will not be as generous to the UK (given that the European Commission wants to punish the UK for Brexit).
We will have to see how the negotiations go and how large firms, who mostly invested in the UK because it's in the EU, behave.
... as opposed to big firms investing in an islamic overrun Germany, already burdened with enormous welfare costs of nonproductive invaders who are intent on making the entire country unsafe for native born Germans?
I'm just guessing, but suspect an investor would look more favorably on the UK for better odds.