We can see a very definite behavior of the dominance graph, depending on whether we are in a bullish or bearish cryptocurrency market.
The current situation, since January / 2018, is that dominance is rising and probably has not reached the maximum of the current cycle.
We must be attentive to the turn, because it will surely be signaling the beginning of a new bull market, in which we will see the rise of BTC and, in the moments of rest of this, rise of the Altcoins.
Good luck to all friends!