The economics of Bitcoin mining improved in December, reports JPMorgan. Hash price, a measure of daily profitability, increased by 5% since the end of November. The network hash rate rose by 6% to 773 EH/s. Miners earned $57,300 per day on EH/s, which is a seven-month high. The hash rate of 14 American miners increased by 94% since the beginning of the year, accounting for 29% of the global network.