UNI, the native token of decentralized exchange (DEX) Uniswap, has surged 9% to become the top gainer in the crypto market today. At the time of writing, UNI has been trading at $10.69, which is up 8.5% over the past day. In the same timeframe, the crypto asset experienced a 31% drop in trading volume, suggesting existing holders might be holding onto their UNI tokens in expectation of a further price rise.