Best thing to do is not make any decision on emotion....[deletions]...Every altcoin is down in relation to BTC, it's like a tsunami receding before the big wave.
Exactly. Use knowledge/wisdom/intuition to identify something valuable. Buy when the waters are receding. Laugh at how awful it feels to do so. This discomfort is a measure of the potential reward, since others will feel it too; blood is on the streets. Few can bring themselves to do this.