Optimism $OP

Optimism is one of the Eth layer 2 scaling solutions. It’s powered by a technology called Optimistic rollups. They’re called rollups because they roll up (or bundle) the data about hundreds of transactions – non-fungible token (NFT) mints, token swaps etc – into a single transaction on Ethereum mainnet (layer 1). When so many transactions are rolled up into a single transaction, the blockchain transaction, or "gas," fee required to pay comes down to only one transaction, conveniently distributed across everyone involved.