To my knowledge and understanding, miners actually do not worry of ETH prices at times like this. They have made humongous profits when ETH was at ATH and $1000 above and even at this less price they are still ready and want to continue mining ETH is because they have the belief that ETH will bounce back and recover soon. Miners are not usually short term thinkers, they do invest a lot of amount in equipments with a long term vision,