The hedge fund titan dumped most of his Nvidia stake. Was it the right move?Nvidia (NVDA 2.49%) has been the hottest stock of the artificial intelligence (AI) boom, jumping more than 500% since the start of 2023, but some of the smartest investors now seem to be changing their tune on the skyrocketing stock.Billionaire Stanley Druckenmiller, for example, piled into Nvidia when ChatGPT was first launched, but now the Duquesne Capital Management founder thinks the rally has run out of steam.Druckenmiller, who ...