Tech companies like MS, Meta, Google and Amazon bought a lot if the infrastructure for the internet over the years. In order to monetize this, they need people and companies to generate data traffic. Before they were pushing stuff like block chain and cloud services, AI is the next thing they're focussing on. At the same time there's the pumping around of investments like between NVidia, OpenAI and Oracle to artificially inflate stock value. So, in short, it's all about hoarding money.