USDC is the regulated, fully-reserved dollar stablecoin — monthly attestations, issued by Circle — and the conservative choice for keeping a casino bankroll in dollars. On Ethereum mainnet you pay gas for that pedigree, so for smaller sessions consider USDC on Polygon or Solana (Duel takes both). Every USDC rail gets the same Duel treatment: $5 minimum, instant payouts, zero platform fees.