Nvidia was not the best example. They get to moon in the case that any AI exponential hits. Most others have less of a wide probability distribution.
Once massively useful AI has been achieved, or it's been determined that LLMs are it, then it becomes a race to the bottom as GOOG/MSFT/AMZN/META/etc design/deploy more specialized accelerators to deliver this final form solution as cheaply as possible.
Most other businesses trying to actually use LLMs are the riskier ones, including OpenAI, IMO (though OpenAI is perhaps the least risky due to brand recognition).