If you want to lose money the yes go ahead and sell.
But if you like many of us want to earn big the next coming years, the hold or buy.
It is good to buy low and sell high. But we do not know the timing. It is difficult to find the right point of action.
Yeah we dont know when is the time to sell our bitcoins but if you stay holding it you will know when you sell your bitcoins because you will see the price will increase not just now but this month the price will rise again. just dont be panic... is just an effect of cryptsy..
I think it is good time to buy now. The price has consolidated for some time and block reward will halve in 6 months.