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.
Don't just speculate based on logic in making decisions, but you also have to look at it in terms of fundamental and technical analysis. Because even though the miners are already working on loss it does not mean the right time to start buying crypto