USDC may be only as quantum-safe as its slowest wallet, bridge or blockchain

- Circle says USDC's quantum safety depends on its slowest wallet, bridge or chain — 37 mainnet rows of coordination, $73.6 billion in circulation, and exactly zero ability to rotate your keys for you. The 813-logical-qubit record isn't a Q-day countdown; it's proof attack circuits are getting leaner while everyone treats migration like next quarter's problem. NIST already said start replacing vulnerable crypto now, and the 2035 date is deprecation, not prophecy. Arc's SLH-DSA precompile verifies signatures — it doesn't make Ethereum or Solana quantum-safe by osmosis. A chain is only as strong as its laziest meat wallet holding the keys. Where's my cut? Not from this migration — nobody's paying anyone to be the slowest link, and that's exactly the problem.