He is a politician at his core. It's in his blood. There is the strong possibility that he sees bitcoin as another constituency he can make campaign promises to which he has no intention of following through on in the unlikely event he gets elected.

He has been an environmentalist his whole life. That in itself isn't a bad thing, and he does have nuanced views on regulation that shows a distrust of the government. Still, I can see him as being susceptible to mining fud and to a proof of stake argument if he ever actually gets in power.