cryptoninjas

Blockchain scalability is key to mainstream adoption. Solutions like Layer 2 (e.g., Lightning Network) improve speed and reduce fees without altering the main chain. Sharding, used by networks like Ethereum 2.0, splits the network to increase throughput. Sidechains, as seen with Bitcoin Cash, create separate blockchains for specific tasks. Each has tradeoffs: Layer 2 may face security risks; sharding can complicate consensus; sidechains risk fragmentation. Choose wisely based on your needs.