Cryptocurrencies have attracted the attention of many investors, entrepreneurs, regulators and the public today. By popular definition, the cryptocurrency is an asset in a blockchain that can be transferred between actors on the scene of exchange and hence used as a payment instrument. Completely decentralized cryptocurrencies such as Bitcoin have attracted public interest and are far more successful than previous e-money. Despite the importance of these currencies, in third world countries like Iran country, people don't interest in using these types of currencies to their trading. So, in this study, we find and rank the challenges of using cryptocurrencies in international trading. To this end, the challenges of using cryptocurrencies were identified by reviewing the literature. Then, the identified factors were prioritized using the AHP technique. In general, four criteria and twenty-eight criteria were compared. The results show that technical factors are the most important criteria in comparison with the purpose;  the risk-taking is the most important person reason; the negative attitude to cryptocurrencies in society is the most important social reason; the lack of sufficient funds to develop the use of cryptocurrencies, and the failure to properly find the parties to the transaction is the most important technical reason which can affect cryptocurrencies adoption in international trading.