No one can actually say yes presently, but the best one can do is to seize the opportunity to trade altcoins now that the dominance of Bitcoin is low, it is profitable right now,move with the trend and know when to sell ,once bitcoin makes a major move, it's going to affect altcoins drastically, so always watch your trade,remember to use stoploss except for long term trades.
Bitcoin's dominance is rising, and I believe it will cause the entire altcoin to bleed in the near future. I believe the altcoin season has not come until bitcoin can break its ATH