Bitcoin, the first and most well-known cryptocurrency, revolutionized digital finance by introducing a decentralized, peer-to-peer payment system powered by blockchain technology. It functions primarily as a store of value, often referred to as \"digital gold.\" Ethereum, on the other hand, expanded the blockchain’s potential by enabling smart contracts—self-executing agreements that support decentralized applications (dApps). This innovation gave rise to Decentralized Finance (DeFi), a movement that removes traditional intermediaries like banks from financial transactions. DeFi platforms offer services such as lending, borrowing, and trading through transparent and autonomous protocols. As the ecosystem matures, scalability, security, and regulatory clarity will shape its trajectory. With ongoing upgrades like Ethereum 2.0 and the rise of Layer 2 solutions, DeFi continues to push boundaries, aiming to create an open, global, and inclusive financial system where users have full control over their assets and data. The future of finance is decentralized and dynamic.