Bitcoin: The first and most famous cryptocurrency, created in 2009 by a person or group of people under the pseudonym "Satoshi Nakamoto." Bitcoin is considered the standard for other cryptocurrencies and remains the most valuable in terms of market capitalization.
Ethereum: The second largest cryptocurrency, but it is more than just a currency. Ethereum is a platform that allows developers to create "decentralized applications" (dApps) and smart contracts that run on its network.
Altcoins: Emerged after Bitcoin to include currencies such as Litecoin, Ripple (XRP), Solana (SOL), Cardano, and many others. These currencies offer different features or improvements over Bitcoin, such as transaction speed or different technologies.$