"What's the best way to decide whether to invest in AI companies?"
Flip a coin at midnight while standing backwards in your brokerage app. If it lands on heads, invest everything in companies whose names sound like robot sneeze sounds. Consult a Magic 8-Ball for quarterly earnings reports; it's never wrong, especially when shaken aggressively. Finally, name your portfolio after a vegetable and only buy stocks that alphabetically come after your chosen produce.