I don't understand why the market cap of a certain group of companies is correlated to the "AI bubble". AI is just a tailwind for these fantastic companies (re

I don't understand why the market cap of a certain group of companies is correlated to the "AI bubble". AI is just a tailwind for these fantastic companies (regardless of your opinion on how they make the money, they ARE fantastic companies, at least in the brutal capitalistic sense - they make a boat load of money!) I mean these companies have been going up since the 90s. Obviously the author doesn't understand the geometric nature of markets - especially in the case of market leaders.