During the fall in prices, it is better to buy altcoins, and when the growth starts, sell altcoins and buy Bitcoin or Bitcoin Cash. Because if you observe the market behavior while serving and raising, you can see Bitcoin drops by 5%, at the same time, most altcoins fall by 10%-15%, but when growth begins and Bitcoin gets +5%, then altcoins grow faster and get 10%-15%. You can make a profit on this difference in Bitcoin and altcoins volatilities.