Privacy coins Zcash (ZEC), Dash (DASH), and Railgun (RAIL) have demonstrated significant upward momentum recently. Zcash surged nearly 350% over the past 30 days, reaching a four-year high of $297. Dash also experienced a notable increase, gaining 83% in the same timeframe. Meanwhile, Railgun, an Ethereum-based privacy project, rose by 184% in the last month. This surge in interest is attributed to traders seeking on-chain anonymity amid increasing regulatory scrutiny.