Ethereum’s dominance in DeFi is challenged by emerging blockchains like Solana, Avalanche, and Binance Smart Chain, which offer higher scalability, lower transaction costs, and faster processing. Ethereum’s high gas fees and congestion issues hinder its efficiency, pushing developers and users toward alternatives. For instance, Solana’s restaking protocols and Avalanche’s subnet architecture attract DeFi projects seeking better performance. While Ethereum retains the largest ecosystem and developer base, its market share in stablecoins and TVL is declining as competitors innovate. Without significant scalability improvements, Ethereum risks losing its DeFi monopoly to these agile, cost-effective rivals.