Zcash (ZEC) led a broad altcoin rally, rising 47.1% to $836 before settling near $810, while a separate, later market snapshot showed ZEC up more than 20% and Bitcoin steady around $77,000. Ethereum and Binance Coin posted moderate gains, and Uniswap rose more than 8%. Exchange reports on Aug. 21 cited ZEC prices of $833.10 on Binance and $815 on OKX, while another report said it gained 13% to an intraday high of $663 and pushed its market capitalization toward $10.8 billion. The rally was supported by expectations that Grayscale could convert its Zcash Trust into a spot ETF, institutional expansion into Zcash mining, Treasury liquidity and optimism over U.S. crypto legislation. Bitcoin Cash gained 31.4%, Cardano rose 19.0%, Dogecoin and WhiteBIT Token each advanced 17.7%, and other major altcoins also recorded double-digit gains.