Privacy on a public chain has to hide activity from the market and stay open to auditors and regulators at the same time. The controls are in the post below. The cost is low: private transfers prove in seconds and settle for under a dollar on Ethereum: https://www.nethermind.io/blog/institutional-privacy-on-public-blockchains-technical-foundations-challenges-and-the-path-to-adoption https://x.com/Nethermind/status/2077727711649259662(Nethermind)