Bitcoin (BTC) mining profitability declined 5% last month primarily becuase of an increase in the network hashrate, investment bank Jefferies said in a research report Sunday. "A hypothetical one EH/s fleet of BTC miners would have generated ~$55k/day in revenue during August, vs ~$58k/day in July and ~$44k a year ago," wrote analysts led by Jonathan Petersen. The hashrate refers to the total combined computational power used to mine and process transactions on a proof-of-work blockchain, and is a proxy ...