This book addresses the main concepts of Decentralized Finance (DeFi) and the well-known economic problem of inflation within traditional financial systems (TradFi). The authors discuss how both systems are connected and describe how they influence each other. Furthermore, new technological developments in the finance sector are considered and explained. The book provides not only a theoretical background to understand how money has evolved over time but also many practical cases and advise to navigate the digital money era. While digitalization and innovation are evolving rapidly, this book aims to be time-independent in its content and in its focus on concepts. The book appeals not only to an academic audience but also to professionals working in the field.