> even if every adult on the planet spent 250$ on AI per year this would still not cover anywhere near what's being invested.

Your math does not make sense. That's something like $1.5 trillion every year. That's no where near what is being spent in AI hardware buildouts on an annual basis.

Last year estimated spend was $380 billion and this year it's $680 billion [0] just for the big five. Given global projections through 2030 being as high as 7 trillion [1], OPs comment seems at least the right order of magnitude.

[0]: https://futurumgroup.com/insights/ai-capex-2026-the-690b-inf...

[1]: https://www.mckinsey.com/industries/technology-media-and-tel...

Gartner estimates that 2026 will have about $2.5 trillion in AI investments, with 2027 reaching over $3 trillion.

https://www.gartner.com/en/newsroom/press-releases/2026-05-1...