Said before here but when blood runs in the street and everybody is scared, good time to invest. Just have balls of steel and don't forget that taking profit never made anybody poorer (learned that when investment went 300% and then back to 50% 
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When everybody is scared that is the perfect moment to buy the problem is that many people that could take advantage of this gets really scared as well and they miss opportunities like that, this is the reason why traders should try to be as emotionless as possible or their emotions will get in the way of making good trades, and even more importantly after they have bought those coins they need to have the tenacity to keep holding no matter what.)