Nvidia shows total liabilities of $32bn, annual profit $73bn. I think they'll be ok.

OpenAI is a much more interesting question. $1.4 tn is 4.7% of US GDP or about 1% of global. It's a lot of money to extract to pay your debt back. Short of full AGI I'm not sure how that happens.

And although I think AGI will happen my thoughts are it'll need algorithmic breakthroughs which are probably best achieved by a lot of different people trying things rather than all the money going to Altman.