Arc's mainnet has been running for six weeks, and on-chain USDC has exceeded $1 billion. This morning, I checked the RPC: 1,090,032,959 coins, with gas costs around 20 gwei. The simplest transaction is about 0.00042 USDC. What I'm more interested in is the use of USDC for gas: the agent wallet only needs to contain USD to make payments. However, the top four addresses account for about 73% of the total; the scale is there, but the distribution isn't.