Bitcoin dominance hasn't peaked yet, I think it could hit 62-64% before turning around and starting a real bull run as many expect.
But in that case, I feel like altcoins will start to bleed if Bitcoin dominance increases a lot. But if Bitcoin dominance increases and the price goes up as well, then altcoins won't pump. But if Bitcoin dominance decreases, but the price goes up, then we are most likely to see a massive bull run. For now, Bitcoin goes up for a couple of days and then takes a correction for two days which actually dumps the entire altcoin market. Bitcoin has been accumulating for four to five weeks, but most altcoins dumped up to 100% in the recent couple of weeks.