Somebody should invent something.
Somebody should invent something that is irreversible, so that it can only be purchased with bitcoin.
It is naive to expect a technological solution to a social/political/economic problem. The bad guys -- "powers that be", criminals, corrupt politicians and officers, cartels, etc. -- will either ban it, neutralize it, or twist it to serve their purposes. (You can see it happening with bitcoin already.) Such problems can be addressed only by substantial, sustained, and clear-thinking political effort.
It's not naive at all. It's naive to think that technology's only purpose is watching cat videos and video phones. It's typical of someone that is over-the-hill to assume all new technology is somehow bad or useless. This is just like the file sharing talks from 10 years ago all over again. All the old folks sit behind desks say "we will stop it" when they don't understand how powerful P2P is. You can ban it, but you can not stop it.