Volatility is quite normal on the world of cryptocurrencies. Prices can be high or low at any moment so if the values are so low then that's the time that I'll buy as much altcoins as I can and on the other hand when prices are rising high then that's the time that I'll sell my altcoins for good profits.
I suggest that you do not buy assets like that. you have to predict growth and improvement in the market, do research so that you don't wait long for the increase in the value of the assets you have. because we ourselves know where throughout the year 2018 the decline occurred, and we all still feel afraid to buy even though the price of cheap assets, because we do not know whether to fall again or increase soon again.