This paper examines the transformative potential of BRICS Pay, a blockchain-based payment system proposed by the BRICS nations, to challenge the dominance of Western-led financial institutions and the US dollar. It explores the system's strategic objectives of fostering financial independence and mitigating foreign exchange risks, its technical design, and the challenges it faces in scalability, interoperability, regulatory compliance, and cybersecurity. The analysis highlights the platform's potential to enhance intra-BRICS trade, reduce reliance on the US dollar, and contribute to a more multipolar global financial order. Furthermore, it identifies critical areas for future research, including economic and geopolitical impacts, technical architecture, regulatory frameworks, and the interplay with emerging financial technologies like central bank digital currencies (CBDCs) and decentralized finance (DeFi). This paper positions BRICS Pay as a significant innovation with implications for financial sovereignty, inclusivity, and global economic realignment.