The billionaire is returning to an old favorite as a way to play continued growth in AI.Stanley Druckenmiller was early to see the potential of the artificial intelligence (AI) trend that's powered the bull market for the last three years.He acquired a small amount of Nvidia (NVDA +2.97%) in the third quarter of 2022 before massively increasing his stake in the chipmaker in the fourth quarter that year. At one point, it was his family office, Duquesne's, largest holding, but he fully disposed of the stock l ...