CoinShares’ Valkyrie Bitcoin Mining (WGMI) exchange-traded fund (ETF) is the worst-performing ETF of 2025, down 43% year-to-date, according to Senior Bloomberg ETF analyst Eric Balchunas. The ETF is made up of several publicly traded bitcoin (BTC) miners. IREN (IREN) is the largest holding at 15%, which is down 42%. Core Scientific (CORZ) follows with a […]