I was just talking to a friend last time and he also lost a large percent of his coins. I asked what he was going to do, and he said that he'll just going to hold it. I believe many people also have this common condition/problem. The market's changing and we can't really know if it's good or bad. I suggest that you too should hold it, anyway it's just the start of the year. Many predict that by the end of 2018 altcoins will go higher much as expected. But if you're uncomfortable with the situation, you can sell just half of it and see what the other half will do. Hope this helps!
Until you can not hodl that amount because you need to have money to do other things and for your life, you will understand why do the loser take loss.No one like to takes loss, but the fact, it is very important for some urgent cases.
Just because investing without experience and became the speculator made some investor lost many money on the cryptocurrency market.
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it hard but i will try my best 
