Why is Nvidia worth so much?

Why exactly is Nvidia valued so highly in the market? Is it simply due to their dominance in the graphics processing unit industry? Or does it have something deeper to do with their forays into areas like artificial intelligence and self-driving cars? I'm curious to know if Nvidia's high valuation is justified by their technological advancements and their ability to stay ahead of the competition. It seems that every time I turn around, there's news of Nvidia breaking new ground in some exciting field. But is this enough to sustain their lofty market capitalization? I'd like to understand the reasons behind Nvidia's impressive worth, and whether investors are betting on more than just their current success.