The rise of cryptocurrencies began with **Bitcoin** in 2009, introducing a decentralized digital currency using blockchain technology. Cryptocurrencies offer an alternative to traditional financial systems by enabling peer-to-peer transactions without intermediaries like banks. This has made them appealing for **speed**, **lower fees**, and **global accessibility**. Cryptocurrencies, like **Ethereum**, expanded beyond currency to enable smart contracts and decentralized applications (dApps). Their popularity surged due to **investment potential**, although volatility and regulatory concerns remain. Cryptocurrencies are reshaping finance, fostering innovation in decentralized finance (DeFi), and prompting debates about their role in the future of global economics.