The question of Ethereum<\/a> Layer-2 security<\/strong> is currently crystallizing tensions between the two dominant ecosystems in the crypto<\/a> market. With over $35 billion locked<\/strong> on networks like Arbitrum, Base, Optimism, and Worldchain<\/strong>, the stakes far exceed a simple technical debate. The arguments put forward by Buterin and Yakovenko touch on the very foundations of decentralization and trust in blockchain protocols.<\/p>\n\n\n\n The timing of this controversy is not coincidental. As Ethereum<\/a> shows a 25% decrease in the first half of 2025 compared to 19.1% for Solana<\/a>, the battle for smart contract dominance intensifies<\/strong>. The SOL\/ETH ratio actually shows Solana outperforming by 26.2%<\/strong> in January, before the bear market affected both assets. This dynamic naturally fuels criticism about the viability of Ethereum’s multi-layer model.<\/p>\n\n\n\n Vitalik Buterin hammers his main argument: Ethereum Layer-2s benefit from intrinsic protection against 51% attacks<\/strong>. In his reasoning, even if a majority of validators collaborated or experienced a software bug, they couldn’t validate invalid blocks or steal users’ assets. This finality guarantee comes directly from Ethereum’s base layer, secured by more than one million active validators.<\/strong><\/p>\n\n\n\nButerin Defends the Security Heritage of L2s<\/h2>\n\n\n\n