To what extent is the law of obligations prepared to deal with the alternative form of currency? Christian Wengert draws on the standard for the law of obligations for currency, since this is heterogeneous and thus prohibits a general analogy. The categorization of norms for the law of obligations for currency does however enable a credible guideline for the law of obligations for cryptocurrencies. This provides a perspective on suggestions for standardization de lege ferenda and the examination of consumer protection.