The financial world is undergoing a seismic transformation as global banks abandon legacy private networks and embrace public blockchains. This comprehensive guide explores the driving forces behind this shift, from the need for instant settlement and reduced costs to the regulatory evolution that now supports permissioned public chains. Discover how tokenized assets deposits, treasuries, money markets are redefining liquidity, and why institutions like DTCC are integrating with Stellar to accelerate adoption. Learn about compliance-ready blockchains that embed KYC, AML, and asset-level controls, enabling banks to meet regulatory demands while leveraging the transparency and efficiency of decentralized networks. The era of SWIFT, ACH, and T+2 settlement is ending, replaced by 24/7 global rails that slash fees and eliminate intermediaries. Stablecoins, CBDCs, and bank-issued digital currencies are becoming mainstream, offering programmable money that operates around the clock. This guide breaks down the new banking infrastructure stack custody, identity, compliance, tokenization, and settlement layers and addresses critical risks including security, governance, interoperability, and evolving global frameworks. With 12 in-depth chapters, it provides a roadmap for 2027–2035, predicting a future where public blockchains form the backbone of banking operations. Whether you are a financial professional, investor, or technology enthusiast, this book delivers the insights needed to navigate the blockchain banking revolution and capitalize on the opportunities ahead.