The legendary investor is moving his capital into two different emerging categories. One stock is already up big for him. Stanley Druckenmiller has sold out of Nvidia (NVDA 0.80%). Saying he regrets selling the stake too early for his Duquesne Family Office, one of the best investors ever confirmed he has gotten out of the high-flying artificial intelligence (AI) stock at around $80-$95 earlier this year. While he is now watching from the sidelines, Druckenmiller was along for much of the 500% gains in Nvid ...