That person is hallucinating or dreaming. But I am not against him, even I wish for bitcoin to reach that high. But let us be real, bitcoins value will not reach that high in 2023. We could possibly hit 50k$ but 250k$ is just a wishful thinking. But who knows I maybe wrong and he is right. Let us just wait for 2023 so we can really decide that what he is saying is real is just purely wishful thinking.
Firstly, the prediction was a long-ago made by Venture capital founder and you might be right when you said he's dreaming due to the previous prediction made by Tim Draper but if we research the price of the bitcoin market through TA there's a chance for bitcoin to cliche the price range he mentioned due to 2024 bitcoin halving.