Uniswap (UNI): Leading Decentralized Exchange Uniswap (UNI) is a decentralized exchange protocol built on the Ethereum blockchain. It allows users to trade cryptocurrencies without the need for a central authority, providing a secure and efficient trading experience. As decentralized finance (DeFi) continues to grow in popularity, Uniswap's role as a leading decentralized exchange makes it a cryptocurrency to watch.