Golden Finance reported that JPMorgan Chase (JPM) stated in a research report on Friday that Bitcoin (BTC) daily mining revenue and gross profit fell for the fourth consecutive month in October. JPMorgan estimated that the gross profit from Bitcoin's daily block rewards in October decreased by 2%, reaching the lowest level 'on record in recent times'. The positive side is that transaction fees soared to 60% of block rewards at the end of the month, providing some relief for hash prices.