"Ethereum's Dencun Upgrade: MATIC, ARB, METIS Lead Gains as Blast Halts Blocks"

Layer 2 cryptocurrencies experienced mixed performance as Ethereum's Dencun upgrade went live, with tokens of Polygon, Arbitrum, and Starknet leading gains while Immutable X and Celo declined. The upgrade is expected to reduce transaction costs on layer-2 protocols and attract more applications, but there are concerns about a potential correction in the crypto markets as anticipation for the upgrade wanes and the probability of a spot ether ETF being approved in the U.S. diminishes.