The shutdown of Samourai Wallet and the indictment of its founders, Keonne Rodriguez and William Lonergan Hill, marks a significant development in the regulation of privacy-focused cryptocurrency tools. Accused of money laundering and operating an unlicensed money-transmitting business, the founders face legal scrutiny over their use of technologies like CoinJoin and Whirlpool to enhance transaction privacy. This case raises concerns about future regulatory requirements for non-custodial cryptocurrency services in the U.S., potentially mandating money transmitter licence. The outcome could impact the broader ecosystem of privacy and self-custodial tools, balancing innovation with regulatory compliance.