I dislike market cap as a measure of a company, as clearly a company can be wildly overvalued or undervalued. It is a not as if the "wisdom of crowds" has calculated the true value of a company.

During some of the pre-crash days early in the century, publications would trot out companies ranked by market cap, as if that really meant something. All I remember is various of these companies going under in the crash, despite their pre-crash valuation.

Revenue is a big deal. And profit too, although Amazon has shown you can keep that close to zero by reinvesting in growth, and that can work too.