Even a company like Chaotic Moon , that has made headlines here for its odd, genre defying creations has to bow to the lure of trends every so often. Fitcoin (not to be confused with the several other apps of the same name) hops on the wearble and bitcoin bandwagon. It starts with any activity tracker that meets two requirements: an open API and an integrated heart rate monitor. For demonstration purposes the company chose a Mio. Then there's an app that measures the activity tracked and converts it into an appropriate amount of bitcoin -- in essence paying you to work out. Or, as the tag line puts it: Get ripped. Die mining.