How to cash in when Brexit happens

Nobody knows exactly what will happen when (if) Brexit takes place, but here are few ideas which may help.
A) if you own properties in the UK, it might be beneficial to sell, say at least one of them and then wait for Brexit. Few months after Brexit the property prices should fall due to investors hesitating or not wanting to invest, and quite a few people will be re-possessed as they will loose employment. You could then re-invest to properties and gain in the size of your portfolio.
B) follow exchange rates and if/when sterling hit $1.4 +, then it might be useful to buy dollars (or euros), if you have cash. You can then see after Brexit to exchange them back to gain in sterling.
C) if you have loans and debts, it may be useful to renegotiate your terms (rates etc.) during 2018 in case your employment situation becomes volatile in 2019
D) it might be good not to take on any further loans and financial commitments until you can more or less see or determine how the economics start to take shape, probably somewhere in 2020/21.
So overall, the nation will loose all the control and will be subject to bow under pressure from any more powerful entity, whether it is the EU, US, China or any other country for whom the UK is not any kind of priority market partner.