The aim of the study – to identify the system of factors and criteria as well as indices of cryptoassets, to develop a model of cryptoassets viability assessment on their basis. A qualimetric approach for developing a factor-criterion model was used in the study. The system of 7 factors and 30 criteria, as well as 60 indices, which laid the foundation for the developed model, was characterised. 57 specialists-experts were questioned to determine the significance of the factors and criteria in the developed model. The factor-criterion model gives the possibility to compare all the system components of the criteria, even if they are measured in different units, and to determine the general level of cryptoassets viability based on integral assessment. This model is a unique instrument of measuring the level of each component of the cryptoasset as well as its whole integrated unity. It is necessary to study not only the indices of separate criteria to assess and understand cryptoasset viability, but also their interrelations and interaction. Coordination of a complex of purposefully chosen criteria will lead to the real result – improvement of the level of cryptoasset viability. This model can be recommended for emitents, investors and cryptoassets users.