I do love optimism, but we need to be realistic.
Some firms are doing better because of the vote, and these firms are the manufacturers and exporters. Problem is, successive governments have made the operating conditions (costs) of manufacturing unacceptably high, so there are very few manufacturers left. Obviously the "Leave" advocates quote the better situation for our exporters, but overall, this country imports not exports, by a massive degree.
America rules the world in terms of currency, so just about everything that we import is priced in US$, and the £ now buys less dollars, that fact is inescapable and no amount of political spin will change that, or any other fact.
Those of us who import and who had both common sense and some spare cash, converted our available £ into US$ to delay the financial impact, and then spent that money on stock which, in many cases, hasn't arrived yet (sea delivery from the far east takes around 5 weeks) so prices haven't gone up yet.
In many businesses, there's just too much competition to allow any price rises, and the firms will just go bust - that's already happening.
And the government are still doing nothing to stop online sellers from abroad evading import duties and VAT, making a bad situation even worse. They have announced plans to do something about this tax evasion in 2 years time, but even if they do, and even if it works, 2 years is a long time.
So yes, let's be optimistic. Let's make the best of a bad job - but let's be realistic too.