This study critically examines the prospects for deep economic integration within the Eurasian Economic Union (EAEU), conceptualized as a regional ecosystem project. The primary objective is to evaluate the potential for achieving advanced levels of integration and the feasibility of introducing a unified currency across the EAEU member states. The research adopts a theoretical framework grounded in the market-institutional approach to economic integration, informed by neoliberal principles, and applies Robert Mundell’s theory of optimal currency areas (OCA) to assess the conditions necessary for a successful currency union. Methodologically, the study employs a statistical analysis of key economic indicators relevant to integration, including trade flows, economic convergence, and monetary stability, within the context of the OCA theory. The findings corroborate the hypothesis that the introduction of a single currency within the EAEU is fundamentally unattainable under current conditions. This conclusion is attributed to significant economic heterogeneity among member states and the heightened geopolitical risks that undermine the stability and cohesion required for a monetary union. The study contributes to the broader discourse on regional economic integration by highlighting the structural and geopolitical challenges faced by the EAEU, offering valuable insights into the limitations of monetary unification in complex regional ecosystems.