Issue #600: x402's USDC Rail, Warsh on Bailouts, SBF Clemency

x402 runs mostly on USDC via Coinbase's Base chain, Fed Chair Kevin Warsh opposes routine Bitcoin and crypto bailouts while reserving systemic-risk intervention, and the Senate opposes clemency for Sam Bankman-Fried. Casa's free Self-custody is step one webinar covers multiple-key security, recovery, inheritance, and social-engineering defense on July 21 at 1 PM EDT; register at https://app.livestorm.co/casabitcoin/self-custody-is-step-one. Three sharp stories in under five minutes, with the full written edition and links at https://www.btcbreakdown.com/p/issue-600