Is AI in a bubble? When will the bubble burst? Are there signs? Well, we don’t have a crystal ball, but there are signs. On the markets, several prominent investors have spoken. Peter Thiel, one of the best-known tech investors, has sold his entire position in Nvidia. SoftBank, a huge Japanese tech investor is unloading its shares, too. Meanwhile, Michael Burry, of Big Short fame, warns of an impending bubble burst. And the head of Swedish fintech Klarna, a man with major AI holdings, said that he’s thinking of hedging his positions…