It will be very difficult to dump the market further(it is possible, but it will be very difficult and dangerous), because the miners are already working at a loss on some coins, like ethereum. Bitcoin almost fell to mining cost price, so, i think, it worth to start to buy now.
I have a number of mine machines, the value decreases and the electricity bills remain so I suffer losses. it's true that you say that now buying is a wise choice because the price of bitcoin goes down. buy and save until the price rises is my goal here.