The rise of cross-chain protocols like LayerZero could indeed challenge the market dominance of individual public blockchains. By enabling seamless interoperability, these protocols allow assets, data, and applications to move freely across ecosystems, reducing reliance on any single chain. This shift diminishes the "walled garden" advantage of dominant blockchains like Ethereum, as users and developers gain flexibility to leverage multiple networks without being locked in. While this fosters innovation and decentralization, it may erode the network effects and economic moats that individual chains rely on for supremacy. However, some argue that leading blockchains could adapt by integrating or competing with these protocols, preserving their edge. Ultimately, the growing adoption of cross-chain solutions might not dethrone major players outright but could redistribute influence, creating a more fragmented yet interconnected blockchain landscape.