it’d be nice if you can time it, but I look on them as a hedge against most of my assets which are priced in GBP or property in UK.
So if GBP rises to those levels - or even higher if article 50 is revoked - then the loss in my portfolio will be as nothing compared to my overall wealth having risen by 5% or 15% respectively.
Like many people you seem to be overlooking the fact that if a deal is done, it is just a start to the uncertainty. It is a basis to start discussing future trade deals but that wont happen straight away because almost certainly it will be the starting gun for a general election with a Labour-led government potentially starting a programme of nationalisation and a policy to have all major companies give 10% of their stock to workers.
Then, once the election is over we can settle down to 5-15 years of trade negotiations and independence referendums followed by negotiations on breaking up the Union.
Or we could revoke article 50 and have done with this nonsense and we will all get much richer over night.