Nvidia has been one of the best-performing stocks in recent years. The company has a market cap of over $3 trillion. It is still a great option for many, but its historic run has forced many investors to look elsewhere for artificial intelligence (AI) stocks.If you missed out on Nvidia, there's one other business you should consider. Billionaires have been buying its shares for decades.Buy the company between Nvidia and its user baseWhen investing in AI stocks, it's important to understand what makes a comp ...