I mean, even if good exchanges exist they can never really guarantee instantaneous transfer from one to another because there's really no way to guarantee demand for a cryptocurrency. Hundreds of them have cropped up that you probably couldn't pay someone to take now, and a rush on one of the big ones isn't even inconceivable.

The failure of, say, the Bolivar does not disprove the value of some other currency.

But yeah, I guess if you're the last guy trying to get out of e-Bolivars you're pretty screwed.

Interesting, thanks for the links. I did indeed mean that I don't count existing exchanges, but will need to investigate the decentralized concept.