Bitcoin’s next difficulty rise could leave some rigs earning less than their power bill

Bitcoin miners face a projected 5.68% difficulty increase around Oct. 16, putting equipment with thin electricity cushions under pressure. If Bitcoin's price, block subsidy and average fees per block stay unchanged, expected revenue per unit of computing power would fall 5.37%. Startmining's network dashboard , captured at 07:02 UTC on Oct. 14, put difficulty at 132.72 trillion and hashprice at $39.77 per PH/day. Hashprice measures expected daily revenue from one petahash per second of computing power, before expenses. For illustrative equipment using 20 joules per terahash and paying 8 cents per kWh, electricity costs $38.40 daily per PH/s.