Cryptocurrencies are digital or virtual currencies that use cryptography for security. Unlike traditional currencies issued by governments (like USD or EUR), most cryptocurrencies operate on decentralized networks using blockchain technology, a distributed ledger enforced by a network of computers (called nodes).

Key Features of Cryptocurrencies:

• Decentralization: No central authority (like a bank or government) controls them.

• Blockchain: Transactions are recorded publicly and immutably.

• Security: Uses cryptographic techniques to secure transactions and control new unit creation.

• Transparency: Everyone can verify transactions on the public ledger.

• Pseudonymity: Users are identified by wallet addresses, not names.

• Borderless: Can be sent anywhere instantly (depending on network speed and fees).

Popular Cryptocurrencies:

• Bitcoin (BTC): The first and most well-known.

• Ethereum (ETH): Known for its smart contracts and decentralized apps (dApps).

• Litecoin (LTC): Designed for faster transactions.

• Monero (XMR): Focuses on privacy and anonymity.

Common Uses:

• Online payments

• Investment and trading

• Cross-border remittances

• Smart contracts & NFTs (especially Ethereum)