A draw housing six Sapphire Technology Ltd. AMD graphics processing units (GPU) used to mine the Ethereum and Zilliqa cryptocurrencies at the Evobits crypto farm in Cluj-Napoca, Romania, on Wednesday, Jan. 22, 2021. The worlds second-most-valuable cryptocurrency, Ethereum, rallied 75% this year, outpacing its larger rival Bitcoin. Photographer: Akos Stiller/Bloomberg via Getty Images