By asking this question, you seem bit afraid of crypto. Don't panic. The market will do corrections for stabilizing.
But don't forget to play safe. I always advise you to take out your investment ASAP.
When it comes to your question,
I don't have a plan to sell my Altcoins. Holding 700000 CND, more than 36Million Kik and few other coins. They have already returned my investments by following my crypto rule.
My Rule:
Invest in best ICO's, only 2 or 3 ICO in a month and when it comes to exchanging will do short time flip and then hold for a long time.