The diploma thesis presents bitcoin together with a brief history of money. It describes the main features of bitcoin, how it is traded and how kept. A comparison is also made to modern fiat currencies. The comparison primarily addresses the question of whether bitcoin can be recognized as a real currency and means of exchange. The primary focus is on key features, that allow trade in a given currency. Comparisons are made on the stability of the currency, how safe it is for trading and how well regulated it is. All of these are factors that affect the recognition of a currency from the people and it's governments while also changing something that in itself holds no real value into an asset with value that can be traded with.