Blockchain-Driven Financial Technology: A Comprehensive Review of Emerging Applications, Market Dynamics, and Future Trajectories in the Fintech Ecosystem

Abstract

Blockchain technology has fundamentally transformed the financial technology (fintech) landscape since Bitcoin’s introduction in 2008, evolving from peer-to-peer digital currency into comprehensive financial infrastructure. While earlier reviews catalogued blockchain applications across individual fintech verticals, rapid developments in Decentralized Finance (DeFi), Central Bank Digital Currencies (CBDCs), real-world asset (RWA) tokenization, stablecoin payment rails, and AI-blockchain convergence have created significant literature gaps. This paper presents a technically grounded review of blockchain-fintech applications as of 2025, addressing deficiencies in existing work including absent unified taxonomies, insufficient regulatory analysis, limited interoperability coverage, and inadequate treatment of institutional-grade deployments. We examine architectural underpinnings across eight application domains, integrating current market data, security analysis, and scalability benchmarks. We additionally present an analysis of the evolving threat landscape, including $3.4 billion in cryptocurrency theft during 2025. Our findings indicate the global fintech blockchain market, valued at $3.4 billion in 2024, is projected to reach $49.2 billion by 2030 at a CAGR of 55.9%, driven by institutional DeFi adoption, stablecoin settlement infrastructure, and regulatory clarity.