According to the source, Visa already uses USDC stablecoins to settle with merchant acquirers and expanded support to Solana and Ethereum to enable faster on-chain settlement; source: Visa Newsroom, Sep 5, 2023. The program involves partners Worldpay and Nuvei to facilitate USDC settlement for merchants alongside traditional rails; sources: Visa Newsroom, Sep 5, 2023; Circle Blog, Sep 5, 2023. Visa frames stablecoin settlement as improving speed and lowering costs versus legacy cross-border processes; source: Visa Newsroom, Sep 5, 2023. This connects card payment flows to USDC liquidity on Solana (SOL) and Ethereum (ETH), a relevant factor for monitoring on-chain activity and liquidity conditions; source: Circle Blog, Sep 5, 2023.