Let's not delude ourselves. Crypto and AI electricity use is bad, but it's a drop in the ocean compared to the banal, everyday carbon sources that really matter. Even Trump cannot make things much worse in the big picture (he's actually been pretty good at providing reasons to decouple even faster…)
He can continue to propagandize the lie to reduce people's belief in changing is good(and has), change laws to benefit oil companies (and has), and cause wars over oil(and has). Seems like he has plenty he can do to make the current situation worse.