According to @rovercrc, Coinbase will add DEX trading to the Coinbase app, enabling users to trade millions of assets on Base; the post did not include an official Coinbase announcement link for verification. Source: Crypto Rover (@rovercrc) on X, Aug 8, 2025. Base is Coinbase’s Ethereum Layer-2 that settles to Ethereum and uses ETH as gas, so any DEX activity on Base consumes ETH and occurs on-chain. Source: Base documentation by Coinbase. For trading, monitor COIN for premarket and options flow reaction, and track Base network activity (transactions, gas used, and DEX volumes) and ETH on-chain metrics to assess adoption if the feature launches. Sources: Nasdaq for COIN trading and options data; BaseScan for Base network metrics; community analytics such as Dune and DeFiLlama for DEX volumes. Wait for confirmation via Coinbase’s official blog or newsroom before sizing positions based on this headline. Source: Coinbase corporate communications.