Ethereum co-founder Vitalik Buterin has reassured users about the security of Ethereum's Layer 2 (L2) solutions, stating that even in the event of a 51% attack, invalid blocks cannot be validated, thus keeping user funds secure. Buterin highlighted that L2 designs are fundamentally reliant on the security of the Ethereum mainnet, which enhances their resilience against such attacks. In related developments, Solana co-founder Anatoly Yakovenko has proposed the creation of new bridges to Ethereum. This move could pose challenges to Ethereum's L2 market share and design, as it raises questions about the feasibility and security of cross-chain bridges. The discussions underscore ongoing considerations about security and dominance within the blockchain ecosystem.