Nvidia is now the world’s most valuable company worth $5.1 trillion. The tech giant leapfrogged its better-known competitors Microsoft and Apple for the top spot on Tuesday when its share price jumped 3.5% on the NASDAQ stock exchange. What the who? Nvidia makes the computer chips needed to power AI – and the results show that for investors, it’s the future. There’s currently fierce competition between Microsoft, Google’s owner Alphabet, Meta and Apple to create the best AI products. Sitting over all of it is Nvidia, which is crucial to all of them. As for the rise of AI, demand shows “no signs of switching off”, some analysts say. Others are more cautious and say the real test will be whether the rival tech firms can not just make a cool product, but also find a way to monetise it.