You transfer fiat in the form of electric signals over networks via plastic cards, sometimes via mobile apps; now what makes Bitcoin different? Maybe its because its not approved or supported by government, maybe its because its popular or became more popular than government backed central bank notes, you define Bitcoin as a ponzi, how ridiculous, even those who have been involved in ponzis would tell you there is no easier example of ponzis, than government backed financial institutions owned by government officials, friends and family. If you were under a government bank loan, paying interest on loans, you will realize sooner than later what banks truely are. Institutions built to enslave the common man while Governors, managers etc live in Porsche houses as a reward for doing nothing. Bitcoin isn't ponzi, its weakness is as a result of greed of a few, who ironical are banksters.