Its good to variaty your investment case in the most profitable alts and according to me this is the best time to invest at ico period .You can partially cut down your total investment from btc to invest in coins like NEO STM NEM.
Well I have a bit different opinion, to me it seems good to hold your coin, because the market is struggling soon the price of bitcoin will overcome all lose and will become at the top of all expensive currency, so I think instead of trusting anything else better if you stay in touch with your investment which is only bitcoin, storing good amount of bitcoin to trade for long term is many times better than trusting other action because bitcoin is the mother of all altcoins,