CNBC's Jim Cramer suggested some artificial intelligence companies might start to underperform after months of easy gains across the board, expressing concerns about OpenAI's ability to pay the billions it's committed to spend on an infrastructure buildout."In this kind of environment, you need to start diversifying into other growth areas, perhaps in time to keep all the king's horses and all the king's men sidelined," he said. "Maybe OpenAI can come public and Humpty-Dumpty won't have a great fall, but in ...