Unknown to the general public just three years ago, Jensen Huang is now one of the most powerful entrepreneurs in the world as head of chip giant Nvidia. Chips designed by Nvidia, known as graphics cards or GPUs (Graphics Processing Units), are essential in developing the generative artificial intelligence powering technology like ChatGPT. Big tech's insatiable appetite for Nvidia's GPUs, which sell for tens of thousands of dollars each, has catapulted the California chipmaker beyond $4 trillion in market valuation, the first company ever to surpass that mark.