Investors, including billionaires, have generated enormous returns by investing in Nvidia (NVDA 1.69%) in recent years. The artificial intelligence (AI) chip giant climbed more than 800% from the start of 2023 through the end of last year as demand for its products and services soared. And with the AI market forecast to reach beyond $2 trillion a few years down the road, it's likely Nvidia will continue to benefit.But it's important to remember that Nvidia isn't the only attractive AI bet to be found. In fa ...