Do you ever get that feeling: when you transfer on-chain, it feels like the whole world is watching your wallet? It's especially obvious on Solana—cheap gas, fast transactions, but the price is that every operation feels like running naked in a glass house. Privacy Cash @theprivacycash is doing just that—handing you a towel.

The principle isn't complicated—it's Tornado Cash moved onto Solana. You throw SOL into a public pool, get a "receipt," and when you want to withdraw, use zero-knowledge proofs—proving you deposited money without revealing which one. On-chain, it looks like a bunch of people depositing into the same contract, and another bunch withdrawing to new addresses—disconnected.

The data is quite impressive: handling hundreds of thousands of SOL, worth over $100 million, with tens of thousands of wallets involved. This shows the demand really exists, not just self-hype. The heat index has increased nearly 70% in 7 days. Although funding info and team background are still black boxes, many are voting with their feet.

My attitude towards these kinds of projects is quite complex. Privacy is indeed a necessity, but regulation could change at any time. The lessons from Tornado Cash are still fresh, and whether Privacy Cash can survive long-term depends on how they walk the tightrope. Additionally, once foundational privacy infrastructure like Arcium is up, the positioning of mixers might be diluted—another question mark.

In the short term, it's about hype; in the long term, it depends on whether they have staying power.