Cryptocurrencies have revolutionized the digital economy, offering a decentralized alternative to the traditional financial system. Based on blockchain technology, they allow for secure, fast transactions without intermediaries. Bitcoin was the first, but today there are thousands, like Ethereum, that expand possibilities through smart contracts. Although their value is volatile, more and more companies are accepting them as a form of payment. Additionally, they promote global financial inclusion. However, they face regulatory and environmental challenges. Investing in crypto assets requires education and caution. Over time, they could become more integrated into everyday life, transforming how we understand money, digital ownership, and trust in networks.