Looking for the next big thing in tech investments? Several billionaire-owned hedge funds are heavily invested in one overlooked AI expert, and you might want to follow their lead.In a recent analysis of 16 hedge funds managed by household-name billionaires, four of the funds held lots of Advanced Micro Devices (AMD 1.89%) shares. What's more, the funds that ranked AMD among their ten largest holdings consistently placed the stock among the top four.That's an interesting showing, since AMD isn't one of the ...