Whether he said that he'll accept payment in Doge for a Tesla. There will be an increase but that's just temporary, unlike bitcoin. Even if he keeps on telling something bad about it.
The effect is very tiny and temporary too.
No one can destroy bitcoin even the richest man on earth but Elon can still create some hype on his altcoin/s despite not a pro bitcoin. It's something different compared to Craig Steven Wright who is no longer cannot create a hype on his coin because although he did not hate bitcoin, but he lied that he is the real satoshi.
That's for sure but it's just temporary.
You see how he made dogecoin on its all time high and now it seems hanging and no more push for the increase on its price.