Privacy is becoming increasingly important in the blockchain space, particularly for Ethereum and DeFi, due to the lack of anonymity in transactions. While solutions like stealth addresses have been proposed, they are incomplete. RAILGUN is a leading privacy solution that provides anonymity through zero-knowledge proof technology. It has been deployed on Ethereum and Arbitrum and can also support other blockchains like BSC and Polygon. Developers and users are starting to prioritize privacy as blockchain adoption expands, and it is expected to be a significant trend in the coming years.