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.
Well you should definitely be there. Now is the time to invest in coins like Paragon, Cardano and Ripple. These are good for earnings and their projects are excellent. Keep investing.
I think ethereum will be a very potential choice for the future and longterm investment. by buying it at the current price I think we can be very rich, if we use large capital. just wait for the next few years