Dimon has a way of making a fool of himself, it's normal for him to go wandering around with the things he says about Bitcoin if he doesn't know the basics. You don't have to have great technical knowledge to know that and that the only way there would be to do it is to make a fork to which the majority of the community would change, as adaseb says. I didn't pay much attention to what he says already, but after seeing this, less so.