Altcoins are hard to speculate, because of the oversupply. There are too many altcoins in the market. This makes potential altcoins less exposure from the public which affect its growth and market movements. There is no fundamental value as majority of the coins were of the cloned ones. With time we'll have better growth with altcoins, and this also gets connected with the market dominance of bitcoin.
it is complicated to analize altcoin price due many factors as trigger for movement beside its supply. internal factors that come from developers side such as supply ,tokenomic, utility and etc. if dev team could not build it well investors will not give their money to project and offcourse price will stuck in a limited range. but i am agree with alot altcoin number its really make us difficult to find which one of them have potency to growth and give us multiply return. observing and research must upgraded to solve this problem.