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?
Actually investing in an ICO is really good especially if it the ICO hits quickly the hard cap. For me my strategy is when the token is available in the market I will sell them all and buy back at lower price because most of the time I joined an ICO I always got behind the time because I hold the token first until the price is so dipped. This is my idea because most of the time ICO when available in the market will be hype at first and then dipped later.