Learn all about cryptocurrency
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Cryptocurrency is a digital or virtual form of currency that uses cryptography for security. Unlike traditional currencies issued by governments (also known as fiat currencies), cryptocurrencies operate on technology known as blockchain and are decentralised in form. This means they are not controlled by any single entity, such as a central bank or government.
All you need to know about cryptocurrency
There are thousands of cryptocurrencies available and thousands more that are now defunct. According to CoinMarketCap, there were 10,032 cryptocurrencies as of mid-2024. New tokens are constantly coming to market.
Cryptocurrencies are supported by a technology known as blockchain, which maintains a tamper-resistant record of transactions and keeps track of who owns what. The use of blockchains addressed a problem faced by previous efforts to create purely digital currencies: preventing people from making copies of their holdings and attempting to spend it twice
A block on a blockchain is a file that contains a block header, transaction counter, and the transactions recorded in the block. The transaction counter lists the transactions in the block, while the block header is made up of several elements:
All i need to know about cryptocurrency
Other advocates like the blockchain technology behind cryptocurrencies, because it’s a decentralized processing and recording system and can be more secure than traditional payment systems. It may also provide a cheaper way to send money internationally; although crypto networks typically charge transaction fees, many traditional international money transfer services charge substantial fees themselves.
There are thousands of different cryptocurrencies out there. Bitcoin’s success led to a flood of new coins—called altcoins—and tokens emerging. Due to the volatile nature of cryptocurrency, it’s best to seek professional investment advice and become very familiar with the crypto industry before deciding to invest. The following are examples of cryptocurrencies with a higher market cap and therefore tend to be more stable. Market capitalization figures are current as of April 3, 2025 :