"Where does it all go?" Well, to "moon" certainly not yet. Mostly it is that when bitcoin grows, growth of altcoins is also going on. But there were times when the bitcoin stagnated and the other altcoins went up.
What, in my view, could be the case. Altcoins go up. "Back to lower lows", the worst we should have behind and below $ 3.5K for bitcoin, we should not go.