Buy when the price is low and hold on to them for a while
Well buying altcoins is a very good idea, but before we buy for altcoins we should think very well on which altcoins we should buy for, so we dont have to regret on what decisions we will make, but for me the best altcoins to buy for is ethereum, because it has large market value and it is very sure that we dont gonna regret this.
Altcoins are good to buy but if you ask my personal experience, i would say No. Even though the prices of alt are very low but they do not see any hope to rise until bitcoin is rising. So better if we invest in bitcoins and get profit day by day, rather than buying alts and stuck our money for few months.