This article presents the results of a comparative analysis of the legislative approaches to the regulation of cryptocurrencies in the BRICS countries and the Eurasian Economic Union. During the analysis, regulatory legal acts and draft laws, including material on judicial practice, of the Russian Federation, China, India, Brazil, the Republic of South Africa, the Republic of Belarus, Kazakhstan, Kyrgyzstan and Armenia were studied. The use of a comparative-legal method makes it possible to develop recommendations about the development of legislation on the circulation of cryptocurrencies within the BRICS countries. The assessment of the experience of EEU countries, and especially that of the Republic of Belarus, has great importance since the Russian Federation is a member country of both the EEU and BRICS. Comparative analysis was achieved by taking into account such key points as the existence of a regulatory framework, regulation of transaction taxation and counteracting the legalization of profits from crime. The results of the analysis are presented for each country separately and then systematized in the form of an analytical table. Based on the analysis, three approaches to the regulation of cryptocurrencies are identified: conservative, liberal and neutral. The study of the experiences of the BRICS and EEU countries allowed the authors to conclude that these countries need to formulate similar requirements for the regulation of cryptocurrencies so as to avoid the migration of investment and capital to other countries which have a more liberal approach.