It depends entirely on your personal circumstances. If you are running a British company which exports goods or services to the EU then Brexit is likely to be very bad. (I have a friend who is the Managing Director of a medium sized British biotech company and we have discussed it at length.)
On the other hand, if you are an unemployed young person living in a run down post-industrial British city then Brexit is good, due to increased job opportunities and more accommodation availability.
But leaving the EU will damage the UK's GDP and it will take years for them to return to their current level of economic prosperity.
Since you use British spelling and your one page of comments on FR only touch a few topics, I wonder why your name indicates big support for Trump. His viewpoints are definitely anti-EU, anti-globalist/NAFTA etc. Another point is that there is more to life than money.
The EU has squashed many formerly profitable British enterprises, and in other countries.
Have you seen “Brexit The Movie”? Yes or no?
You and your friend are looking only short-sightedly and from a short-sighted economic perspective.
Your friend has bought into the scare tactics and you have fallen for his failed vision.
The economic shifts with the EU will be slow, with plenty of time for alternative trade arrangements to be cemented. And the overall economic prospects for a UK that restores freedom and stops Islamization is far above what you and your friend think you foresee.