Of course that's true, but what's the point of building a decacorn company just so you have higher chances of building another decacorn company afterwards?

If money was his motivation, why wouldn't he spend his time building a company like that in the first place? As the head of YC, I don't think he would've had any trouble raising for anything, even prior to OpenAI.

Also, it's not really parent's "point" as you claim; they quite explicitly talk about compensation in case of acquisition.