Introduction. Сryptocurrency as a component of Ukraine's digital war against Russia. Rapid collection of funds from all over the world to help Ukraine.The USA imposes sanctions on the Russian Federation. Russia is looking for methods to circumvent sanctions. The purpose of the research work is to develop proposals for greater effectiveness of international sanctions and to find new useful methods of using cryptocurrency for Ukraine, which is part of the international financial system. Problems. Sanction packages are applied to various sectors of the economy, and following the implementation results, the following packages of sanctions are produced by the countries, so, according to the results of the implementation of sanctions, certain Russian banking institutions have been circumvented by using crypto market tools and operators that interact with sanctioned Russian banks, companies, and individuals. The use of traditional financial services, financial technologies and alternative payment services is a more effective way of circumventing sanctions in terms of volumes and costs than the use of crypto-assets.Goal. Development of proposals to increase the influence on the implementation and effectiveness of international sanctions, the need to take quick and optimal actions to eliminate the activities of many Russian cryptocurrency tools for circumventing sanctions. Materials and methods. General scientific and research methods are used: analysis, theoretical generalization, synthesis, description, comparison, observation and study of foreign mass media articles. Results. Attention was focused on Ukraine's new positive use of cryptocurrency, which is part of the international financial system, unprecedented use of new digital assets to raise funds to support Ukraine during the war. Conclusions. Crypto assets have become Ukraine's deadly weapon against Russia. Taking into account the advantages of the circulation of cryptocurrencies and virtual assets in general, the private sector in Ukraine organized charitable funds for the accumulation of resources, among which crypto funds took a leading place and were able to quickly cover the needs of defenders of Ukraine, citizens who suffered from Russian military aggression, supported socially vulnerable Ukrainian citizens. At the same time, IT specialists and amateurs organized themselves into an IT army, which was able to completely or for significant periods stop the activity of the infrastructure of the aggressor states, which slowed down the flow of resources for the continuation and escalation of military operations.
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