I think that you can bring a better topic than this In my opinion if this is pure speculation. You can imagine whatever you want but you must remember that if he will not use whole of his money to invest in the speculative coin that's really volatile. that's the same like bring his life to the speculation. It will not happen forever.
Keep dreaming but i hope you will wake up soon.
When he shown interest on ethereum? He talked about Bitcoin and highly manipulative over Doge apart from this he didn't talk about any other coins.
At least he owns it. it doesn't matter if he was not showing his interest with ethereum but he bought it. that's more than enough to be considered as a symbol
https://www.fool.com/the-ascent/cryptocurrency/articles/elon-musk-reveals-crypto-holdings-heres-which-cryptocurrencies-the-billionaire-owns/