The artificial intelligence (AI)-powered software company has a great business model, which is a feature behind all stocks that are big winners over the long term.Nvidia (NVDA 2.09%) is a terrific artificial intelligence (AI) company and its stock is worth buying for many reasons. These include that it dominates the rapidly growing AI chip market and its CEO Jensen Huang has a stellar track record of staying ahead of the competition.That said, Nvidia's massive size will make achieving strong percentage grow ...