The recent massive selloffs in bitcoin and other crypto currencies have left Ebang, Canaan and BIT Mining coping with tanking share prices and dire business outlooks.Ebang, a maker of cryptocurrency mining machines, has been warned about potential delisting from the Nasdaq after its stock remained below $1 for a prolonged period.Rival crypto mining equipment maker Canaan repurchased warrants it issued last year after its stock plunged to levels well below the exercise price.