Cryptocurrency is a type of digital or virtual currency that relies on cryptographic technology to secure transactions and control the creation of new units. Unlike traditional money issued by governments (like dollars or euros), cryptocurrencies are typically decentralized, meaning they operate on a technology called blockchain, which is a distributed ledger maintained across many computers in a network.

Key Features of Cryptocurrency

1. Decentralization: Cryptocurrencies usually don’t rely on central authorities like banks or governments.

2. Blockchain: This technology records transactions across many computers, making the currency's history transparent and nearly impossible to alter.

3. Security: Cryptocurrencies use encryption techniques to secure transactions and control the supply.

4. Pseudonymity: Transactions can be made without revealing personal information, though some details may be traceable.

Examples of Cryptocurrencies

Bitcoin (BTC): The first and most well-known cryptocurrency, created by an anonymous entity known as Satoshi Nakamoto.

Ethereum (ETH): Known for its smart contract functionality, allowing developers to build decentralized applications.

Ripple (XRP), Litecoin (LTC), and Cardano (ADA): These are some other notable cryptocurrencies, each with unique features or technology.

Cryptocurrencies can be used for various purposes, from online transactions and remittances to investments and powering decentralized finance (DeFi) platforms and non-fungible tokens (NFTs).