Think this one was the one going around

Not sure what you can lookup, probably stuff like "AI investment bubble"
This is probably a good resource (haven't read it) https://en.wikipedia.org/wiki/AI_bubble (specifically look under Speculation > Circular Financing, soz dunno how to link to a header)
I don't have a source and this might be old news, but a lot of the big deals right now are just "promises" to invest I think (money, etc not exchanged hands yet)