Most people on this thread seem to be die-hard hodl fans.
The crypto market, like the stock market... like any other investment market should never be the basket you put all your eggs into.
Sure, with the gains we had seen in 2017, people got really excited, but an investment should never be something you're not willing to lose. Remember, any money you put into the market should be something you can walk away with 0s and still be ok with, basically happy with the lesson you've learned.
If you let fear kick in what will happen? You'll walk out with 50% (or less) of what you had put in with the bitter flavor of a bad investment. And who knows, a few months from now your 50% loss could've been a 10x gain that you missed due to fear.
Hodl, and hope for the best. Spread the word of crypto. Help advance the tech, and you'll be sure to see returns.