USD Coin. A stablecoin issued by Circle that maintains a 1:1 peg to the US dollar via reserve backing. You send dollars to Circle, they mint USDC on-chain; you burn USDC, you get dollars back. It runs on Ethereum, Polygon, Solana, and other blockchains.
Why it matters for domain registration: USDC lets you pay in crypto without the volatility gamble. You know the price won't swing 30% overnight. For bunkerdomains, USDC is faster than wiring dollars and doesn't require a bank account or KYC. Just a wallet. You get the settlement certainty of fiat, the payment privacy of crypto. No chargebacks, no disputes—transaction confirms, domain renews, done.
Compare to USDT (larger, more liquidity, older, some custody baggage) and to straight BTC or ETH (hodlers and traders, not payment currency). USDC is the stablecoin that most registrars and crypto payment processors default to when they want stability without compliance friction.