According to @GracyBitget, a short video clearly explains zero-knowledge proofs in the first three minutes, making the concept accessible for traders who want a fast grasp of ZK fundamentals; source: @GracyBitget on X. Zero-knowledge proofs let one party prove a statement without revealing underlying data, a cryptographic primitive that powers ZK-rollups and trust-minimized privacy features; source: Ethereum Foundation. ZK-rollups aim to scale Ethereum by moving computation off-chain and posting succinct proofs on-chain, inheriting L1 security while improving throughput and fees, which directly affects on-chain activity and user costs relevant to trading ecosystems; source: Ethereum Foundation. Active ZK ecosystems include Polygon zkEVM with the MATIC token, zkSync with the ZK token, Starknet with the STRK token, and Mina Protocol with the MINA token, all of which implement zk-SNARK or zk-STARK technology; sources: Polygon Labs, zkSync Foundation, Starknet Foundation, Mina Foundation.