Hold only good coins, don't hold shitcoins. If you don't sure that coin will go to the moon, don't hold it, sell it if price falling.
In january I bought 1ST for 1$ and sell it in february for 0.7$, now price is 0.38$. I loss money, but only 30%, not 60%.
This is the best response I've read so far. What is most important is ensuring that you hodl good coins mostly. Hodling shitcoins will get you nowhere. I have a few shitcoins, and I can tell you they've almost become dust in my wallet, hardly can they become of any worth again.