Cryptocurrencies are digital or virtual currencies that operate on distributed ledger technologies called blockchains. They are decentralised, operate independently of a central bank, and use cryptography for security. Unlike traditional currencies, cryptocurrencies are not backed by a physical commodity or government, and their value is determined by market demand and supply. Cryptocurrencies can be used to buy goods and services, transfer funds, and trade in markets. Popular cryptocurrencies include Bitcoin, Ethereum, Litecoin, Ripple, and Cronos.
Many cryptocurrencies, like Bitcoin, are created through a process called mining, which involves solving complex mathematical equations to validate and record transactions on a blockchain. This mechanism is also called Proof of Work (PoW). Another consensus mechanism that has increased in popularity — as it is more energy efficient — is Proof of Stake (PoS). Instead of mining, PoS relies on network participants validating transactions. Ethereum, the second-largest cryptocurrency, uses this consensus mechanism.