One thing maybe missing from the many good comments here is a separation of digital currencies from crypto coins. We would do well to start separating the mech

One thing maybe missing from the many good comments here is a separation of digital currencies from crypto coins. We would do well to start separating the mechanism that stores value from the mechanism of exchange. That's why I think something like GNU Taler backed by ordinary dollars is a much better way for selling burgers and pizza in any foreseeable time-frame.