Sometime this is very painful when we are expecting a very positive, a very aggressive market but suddenly we see the whole market have crashed and all panic selling start. Here is what we need to do,
Sell coins and be safe - and why did you buy? To sell in a loss? - Sell our Coins and be safe
- Wait for a little bounce back and exit
- Let it be and remain Relax
You probably do not understand the real potential of cryptocurrencies, we are first inventors of the new technology that will change the world as we know. 
Sometime sell coins can save your life,selling your assets/coins while the market have crashed.
We don't know when the price will rise up/ maybe the price will falling more deep or maybe the coin will doesn't has value anymore(I had a bad experience about Bankera,the price can't rise up Then the coins has no value anymore)
it Depend on what coin you have