币界网报道：Altcoins are experiencing a notable surge as several major testnets and airdrop events gain momentum in the crypto market. Projects like Arbitrum, zkSync, and StarkNet are drawing significant attention with their upcoming token launches and incentive programs. Arbitrum's long-awaited airdrop is fueling speculation, while zkSync's ecosystem is expanding with new DeFi integrations. StarkNet's recent testnet upgrades hint at a potential mainnet release soon. Meanwhile, Layer 2 solutions continue to dominate discussions, with Optimism and Polygon also rolling out updates to enhance scalability and reduce transaction costs. Analysts suggest this activity signals renewed investor confidence in altcoins after months of subdued performance. Market watchers are closely tracking these developments, anticipating potential price movements as these projects transition from testnet to mainnet phases. The flurry of activity underscores the growing competition among Layer 2 platforms to capture market share ahead of Ethereum's next major upgrade.