This is the best time to invest or buy any ICO, because your investment of any dollar will eventually earn you more token as market reverses
Investment principle is simple you buy when prices are down, and sell when prices goes up.
And Now the scenario is just right for that so go ahead buy ICO's with good prospects that's my advice
you can participate in Inmediate ICO if you want to invest in ICO while Ethereum is cheap

I Hope This Helps