Funny, what my old (80+) man said to me, while I was trying to explain to him what was happening, as I was oggling Coinigy. See, I had to start all the way back to what cryptocurrencies are, but he said:

"Doesn't matter, son: never sell when it's falling, never buy when it's climbing". Hehe, I wouldn't dare to disobey, would I ? So: buy and hodl !

PS: On second thought, I think he still has some of those 1917 Russian bonds...Hm.