Every change, specially the big ones, have resistance from those who like comfortable environments.
There was a time in which the church prosecuted (to say the least) anyone with a relevant scientific breakthrough.
"Wait, what? The Earth is NOT the center of the UNIVERSE? Hahahaha, that will never happen."
I lived in Chile, one of the most seismic countries in the world. I've realized that people are afraid of earthquakes because when the ground shakes, they realize the land, that thing they though was stable, starts shaking! So the brain enters in state of shock, cause literally their brains can't handle change.
If you see people getting infuriated (emotional, with no specific or rational reasoning behind it) with something like crypto, it's because they are afraid of it. And if they are afraid of it, i'ts because they see it as a threat to their stability. They know it will somehow change the way we relate with each other. Deep down they know it's a complete and utter game-changer.