Is this meant as a joke? Because almost the whole world is working on outlawing or "regulating" these and they aren't even anonymous most of the time. Not being controlled and centralized is threatening enough.
Could you please expand? In this area, the only ones available I found have a surcharge of ~5..10% (you buy a 100€ card through 105€..110€). Note: I am not certain of the amount, it has been a while since I used one.
And in Europe electronic payments cannot by law be anonymous over 150€.