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%.
until now no one can know with certainty and the exact development of cryptocurrencies if we start to know all the risks that will be obtained, of course we will remain patient and have confidence in investing with any coin