If people sell bitcoin for other coins, this will lead to btc losing its dominance on the market. It is a good thing, actually,  because a heatlhy dominance is below 45%. It might also lead to its price falling, but I don't think that many people will engage in this activity anyway, so the price will probably stay the same. It's too low to fall even more anyway. Eth is crazily low right now, I don't even understand how such a price is possible. I do hope that new successful ICOs will finally try helping the market, not contribute to its already bad condition.