By the same utility argument there should be no nuclear weapons, an all out push for zero emissions energy, and world peace, but don't hold your breath. There are existing, very powerful stakeholders such as the governments and militaries of numerous world powers who would far prefer that financial transactions not be anonymous. Tech folk sometimes forget that their bodies live in meat space, not cyberspace, and whoever controls the guys with weapons (i.e., controls police and armies) controls meat space.