Single stock investing: does it work?

The first couple of axioms in the book ‘Zurich axioms’ make a good reading for this topic.
Minor Axiom 3 is “Resist the allure of diversification”.

Do read it. It gives a way to play undiversified bets (meaningful stakes). Overall, you can chose a method but know to play it right. There are a list of things that come along when you do not diversify etc.

Edit: I am not saying it works or does not. Only saying there is some literature on this that can be read