#CryptoSecurity101 based on blockchain technology, which offers secure, fast, and transparent transactions without the need for intermediaries, such as banks or governments. They emerged with Bitcoin in 2009 and, since then, have evolved to include thousands of other currencies, such as Ethereum, Litecoin, and many more. They represent a revolution in the financial system, enabling economic inclusion, smart contracts, and new forms of investment. However, they also face challenges, such as volatility, regulation, and security risks. Despite this, they continue to attract global interest, with promises to transform the digital economy and redefine the concept of value and ownership.