Cryptocurrency transactions are irreversible and secure.

When a transaction is confirmed and added to the blockchain, it cannot be reversed, providing a high level of security and reducing the risk of fraud. This feature is achieved through the use of cryptographic techniques that ensure the integrity and immutability of the transaction data. While this irreversibility can be advantageous in preventing chargebacks and fraud, it also means that users need to be cautious and ensure the accuracy of their transactions since mistakes cannot be easily corrected once confirmed.