Yes it growth very slowly, and I see the altcoin movement depends on the movement of the bitcoin if bitcoin rises sharply, Altcoin will go down, this event is almost the same as in early 2017
It's seems to be like that, most of the time when bitcoin move up chances that Alts will fall a little as holders will sell out fast, wanting to hold btc as an asset making sure that they will get much better value of investment to people who hold and wait.