The Bitcoin network hashrate declined modestly in the first two weeks of October, dropping 5 exahashes per second (EH/s) to an average of 1,030 EH/s, Wall Street bank JPMorgan (JPM) said in a report Thursday. The pullback in the hashrate follows the successive record highs seen in August and September. U.S.-listed miners that the bank tracks now account for around 38% of the global network. The hashrate refers to the total combined computational power used to mine and process transactions on a proof-of- ...