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.
In fact, now many people are starting to panic because of the current situation on the crypto market, they are actively selling their coins. Personally, I am convinced that they are making a big mistake - now it is better to continue to buy and hold good cryptocurrencies, from next year we will again notice an active increase in prices.