Cryptocurrency transactions are anonymous in the sense that they are not linked to an individual's personal information. Instead, transactions are recorded on the blockchain using a public address, which is a string of numbers and letters. This public address is not linked to a person's identity and can be used to send and receive cryptocurrency without revealing personal information.
However, it's worth noting that cryptocurrency transactions are not fully anonymous, as in some cases it's possible to trace the transactions back to the user through advanced analysis of the blockchain data. This is commonly referred to as "pseudonymous" transactions.
In addition to being anonymous, cryptocurrency transactions are also irreversible. This means that once a transaction is confirmed and recorded on the blockchain, it cannot be undone or cancelled. This is because each block in the blockchain is linked to the previous one through cryptography, forming an immutable chain. This feature of cryptocurrency transactions provides security against fraud and double-spending, but also means that mistakes cannot be corrected and funds cannot be retrieved if sent to the wrong address.