Original link: Paul Krugman says the AI boom reminds him of the dot-com bubble and predicts it may end with a 'giant tech-bro bailout' / BusinessInsider.
First let us note that Paul Krugman did not get the Nobel prize in economy for identifing bubbles in stock prizes either overall or in specific sectors, so he is not necessarily a super-expert in this area - just a very smart guy.
But I think he has good arguments that the the foundation for stock prizes of any company involved in AI skyrocketing is pretty thin.