Payment service providers (PSPs) are evolving from simple transaction processors to complex coordinators of fund flows in the modern payment landscape. Despite the mainstream adoption of digital payments, settlement processes remain outdated, often relying on SWIFT and facing delays due to local regulations and intermediary banks. This structural inefficiency is most pronounced in PSPs, which must now manage multi-step transactions involving various payment rails and compliance layers. The rise of real-time payment networks like RTP and FedNow, along with stablecoin-based settlements, is forcing PSPs to adapt. Real-time payments eliminate the buffer for error correction, requiring risk assessments and compliance checks to be completed before funds move. Meanwhile, stablecoins offer a new settlement pathway, enabling near-instant fund transfers and introducing the potential for yield on funds in transit. As PSPs navigate these changes, they must provide a unified view of fund flows across diverse channels to maintain operational efficiency and competitive advantage.