In the short term and probably long term Britain will be poorer leaving the EU however the EU is well down a road paved with good intentions. Its bloated ever expanding monster needlessly provoking the Russian. Why don't the Russians want the EU and Nato on their borders, well I can give you about 20 millions good reasons.
At the same time the EU has a soft underbelly it is incapable of protecting, when the migrant crisis started every naval vessel in Europe should have been intercepting boats, towing them back to their point of origin and then sinking them. How would the Libyans stop us they, the couldn't. How would the Turks stop us, the same way the stopped the Russians bombing Syria flat, they couldn't either. In fact it might actually have stopped Erdogan destabilising Syria if he couldn't palm the refugees off on Europe. Europe could have imposed a ban on all Turkish goods entering the EU, no more Biko washing machines.
The EU brings prosperity to people. It doesn't it brings people to prosperity. Hence the fact that millions of bright economically active young people are leaving their countries to work in Germany and the UK. The Eurozone was a political creation whose rules were ignored to allow countries like Greece, Italy, Portugal and Spain to join without undertaking any kind of economic reform. It keeps German exports artificially cheap and has created mass unemployment in the Southern States. Greece should have left the Euro years ago, devalued its currency so that it was cheap for tourists and making its exports cheaper instead its locked into constant austerity.
France WILL be like Syria in 20 years time if not sooner. Of course someone will come along and say " don't be that's so silly" or "I'm French and that will never happen". At which point I will fill several pages worth of horrific terrorist and anti Semitic attacks proving it really fucking will be. Not ones from Breibart or Gatestone but from legitimate main stream news website's. Here's one below . Who needs Russian fake news when the real thing is more horrific than anything they could invent.
www.telegraph.co.uk/news/worldnews/europe/france/12098456/Killing-of-Jewish-politician-near-Paris-prompts-fears-of-anti-Semitic-attacks.html
The EU is a train wreck and I'm glad we're out of it.