I only invested in one ico so far and that is ong.social. Who knows if that was the best choice but I just liked the work they already did and how active they are in the community. I will hold the coins longterm. Normally I do not invest in icos because like mentioned from others many times, most of the time price drops hard at the beginning so often there is a good chance to
buy cheap. Another advantage of not investing in ico is that you are not putting your money at risk before there is even a tradable coin released on an exchange.