I'm not sure if you're being serious here or not.
When people make predictions like this, they rarely use soft language like "might" or "might not" because then why bother saying it at all? Anything might happen. By saying it will happen, I saying I believe this is what will happen. It may not, but based on my observations I believe that is what will happen.
So no, it's not moronic to claim it will happen on the basis it may or may not happen. If you do not understand this, I would suggest you are being moronic.
In case anyone doesn't realise yet, we're now at the real beginning of the bit where everything goes to ****.
As an actual Brexit becomes more and more certain, and the Tories press blindly ahead with what is looking more and more like a Hard-Brexit, we start to see the real effects of our stupidity.
It's genuinely rather worrying.
We're going through the challenging period that most everyone expected to occur following Brexit, but the economy is pretty robust right now and there's no reason to think the doom times are upon us.
The EU is also about to enter a turbulent year with elections in the Netherlands likely to deliver an anti-EU government, followed by elections in France and Germany where nationalists will make gains.
Whatever problems Britain is facing currently, it will become a relative safe haven in the new year as despite the concerns over Brexit, there'll be bigger concerns about the existential threats in the EU and Chinese economies.

The 6% is being investigated and the larger drop happened months ago - panicking every day for the next 5 months seems slightly ridiculous.
I genuinely hope things turn out well. I didn't want Brexit at all, but if it's happening, then I hope it works out really well.
I genuinely hope things turn out well. I didn't want Brexit at all, but if it's happening, then I hope it works out really well.
?Will implies a definite. Banks don't release research notes with definite stances, it leaves them open to litigation. And then you tell us to relax - so we should all relax based upon your observations?
GBP prediction language:
Goldman Sachs: Could
Credit Agricole: Could
Soc Gen: Expect
Danske: Expect
UBS: Should
ING: Sees
Deutsche: Believes

Its going to fluctuate until at least A50 - if you want to panic and freak out thats up to you but what value is there in that given you have zero influence on it?
Interestingly one theory is that automated algorithms that scan social media may be the cause of the drop - basically remainers losing their **** over every little EU threat, thanks Remainers!