Circle has launched the public testnet for Arc, a new Layer-1 blockchain focused on stablecoin finance. The network aims to establish USDC as the primary gas token, enhancing its utility in blockchain transactions. Over 100 firms, including Visa and Coinbase, are involved in this initiative, which is spearheaded by CEO Jeremy Allaire. The project seeks to streamline stablecoin transactions and increase institutional adoption of digital currencies.