Zcash (ZEC) mining currently produces roughly twice the daily revenue per machine and about four times the revenue per megawatt-hour of Bitcoin mining, according to Grayscale Research director Zach Pandl. Bitcoin remains far larger in aggregate, with miners earning about $35 million in daily rewards compared with roughly $2 million for Zcash miners. Zcash mining activity has increased more than 2.5 times year-to-date as ZEC's price rose above $1,000 on September 4 for the first time in nearly a decade and traded near $1,177, up almost 15% over the preceding week. The comparison is limited because Bitcoin and Zcash use different specialized mining hardware, while revenue figures exclude electricity, hardware, cooling and maintenance costs. Grayscale's spot Zcash ETF, ZCSH, listed on NYSE Arca on August 25 and accumulated more than $500 million in assets within two weeks.