Many ICOs have their token sold at a fixed price vs. the ETH. For example: 1 ETH = 1000 Tokens.
So does it really matter if the prices of ETH/BTC is dropping?
If anything, then buying now you get more Tokens for the $, right?
It is difficult to predict the price of ICO coins, especially when the coin is already listed in the market, sometimes the price is often far from expectations, even though the price of ETH rises but still it has no effect, it all goes back to many interested people to buy the coin.