According to @AggrNews, MetaMask is set to introduce a new stablecoin called 'MetaMask USD', which will be issued by Stripe as per a recent governance proposal. This move could create new trading pairs and liquidity opportunities within the DeFi ecosystem, as well as potential arbitrage strategies involving major stablecoins like USDT and USDC. Traders should monitor the rollout and integration of MetaMask USD for its potential effect on transaction fees, cross-chain swaps, and stablecoin dominance in the crypto market (source: @AggrNews).