Arc Public Mainnet Launches September 16 with USDC as Gas Token

Circle's Arc (Arc) is set to launch its public mainnet on September 16, utilizing USDC as the default gas token and supporting sub-second transaction finality. The Arc official blog stated that Arc aims to target financial markets, real-time fund movements, and agent-based economic activities.

Bitcoin ETFs saw a net outflow of 53.53 BTC in a single day, while Ethereum ETFs recorded a $51,443 ETH outflow. On September 16, Bitcoin ETFs experienced a $45.45 million net outflow (approximately 55.14 billion KRW), with cumulative outflows over the past seven days totaling $75.042 million (around 1.206 trillion KRW). Ethereum ETFs also saw a $51,443 ETH outflow on the same day, as reported by PANews citing Lookonchain data.

The U.S. Securities and Exchange Commission (SEC) proposed amendments to Rule 14a-8 for shareholder proposals and revisions to Rule 14a-4(c) regarding proxy procedures, both submitted on September 16. The proposal will undergo a 60-day public comment period before finalization, after which the acceptability of shareholder proposals will be determined based on state law and corporate governance documents.

Deutsche Bank is advancing plans to launch institutional custody services for Bitcoin (BTC), Ethereum (ETH), and USDC, pending MiCA authorization in October. BlockTempo reported that Deutsche Bank is preparing these services with the MiCA approval as a prerequisite, though actual launch depends on regulatory clearance.

Zcash (ZEC) holders overwhelmingly approved reducing the block target time from 75 seconds to 25 seconds, with a 99.9% vote in favor. The voting concluded on September 14, but the NU7 upgrade's implementation still requires development and verification processes.

Flamingo Finance suffered a flash loan attack worth $18 million (approximately 24.48 billion KRW), with attackers realizing approximately $345,900 USD in USDT profits. PANews cited Blockaid monitoring, noting that attackers borrowed USDT from Morpho and inflated VaultYUSDT token prices using Curve USDP LP.

2,339 BTC moved from a Coinbase institutional account to an unknown wallet, valued at $177.09 million (around 240.9 billion KRW), as reported by Whale Alert on September 16. The destination and purpose remain unclear.

32,190 ETH worth $77.008 million (approximately 104.7 billion KRW) moved from an unconfirmed wallet to a Coinbase institutional account, according to Whale Alert on September 16, transacted on the Ethereum network.

The virtual asset market saw $632 million in futures positions liquidated within 24 hours, with long positions (bets on price increases) comprising over $570 million of the total. AMBCrypto reported that approximately $600 million was liquidated, with more than $570 million being long positions.

Solana (SOL) awaits mainnet activation for its upgrade reducing slot time from 300ms to 250ms, though exact dates for the 250ms and 200ms stages remain undetermined. The Solana Foundation confirmed that the 350ms and 300ms stages have already been deployed on mainnet, with 250ms and 200ms stages currently operating on devnets and testnets.