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.
Why would you ever dump the market? I think that is a bad decision to consider, maybe you could try to pull the market of cryptocurrency upward rather than making it dumped in the market.