In this article, the change of the model of the international monetary system with the emergence of cryptocurrencies as a novel phenomenon has been investigated using analytical-descriptive method. Relying on blockchain's secure validation mechanism and decentralized mass collaboration, digital currencies are the latest financial tools that companies use to raise capital and develop technology. The significant entry of capital into the transnational industry has involved not only investors, but also governments and regulatory agencies with the aim of maintaining the regulatory role of the government, which is one of the main functions of the modern governance system. After reviewing the legislative efforts of countries regarding cryptocurrencies, the capability of digital currencies with the aim of providing a global common currency has been investigated; to countries without monetary dominance by a specific country; Like the current problem of the monetary system caused by the dominance of the dollar, it can use a universal common currency. Perhaps at first glance and considering the position of the dollar, the above idea is difficult to understand, while the laws established for blockchain and digital currencies are not yet strong enough to completely remove the hegemony of the dollar; But with the development of technology, it is definitely possible to design an efficient and accurate blockchain for this purpose. After studying various aspects, this research has proposed the possibility of providing blockchain to create a global stablecoin, taking into account the legal dimensions, as a global common currency.