Tinfoil hat: I'm actually on record as speculating that Brexit is just a big currency trading scam. Imagine that you go into Brexit knowing that you will make it fail. You spend 2 years sitting on your prosterior, not actually forming a deal and then at the last minute: OMG what are we going to do. The currency bounces around like a yoyo. You time all the nice low points. And then you cancel it saying "Oh we tried our best. Nothing we could have done. The EU was bent on screwing us if we left". The pound jumps 20 or 30 cents on the pound overnight.

I will literally fall over if it actually comes to pass, but like I said, this was my somewhat tongue in cheek speculation about 6 months ago (although I predicted that the budget would fail leading to a general election and an opportunity to repeal Brexit at that point, so I'm already technically wrong).