Harmony token plunges 40% after unauthorized mint

The Harmony blockchain experienced a significant security breach where an attacker minted 4 billion $ONE tokens, causing the token price to plummet by 40%. The incident led Harmony to pause its token bridge and request exchanges to freeze tokens related to the attacker. The possibility of a rollback to revert the blockchain has sparked controversy due to the importance of immutability in cryptocurrencies. This incident follows previous issues the Harmony network has faced concerning unauthorized token minting and significant theft.