Given today’s cryptocoins, this may seem like a pipe dream. But it’s not really as hard as it may seem. Imagine a currency backed by an asset which can pretty easily be delivered by a loose network of providers who accept the currency in payment for: electricity from solar panels, computing power from idle computers, rides from passing drivers, stays in empty bedrooms, etc. A currency tuned to kilowatts or computing power would have a strong enough internal value to serve as center of gravity and common economic need.
