I sold my bitcoins when they were 460$ at that time, so i got even more profit before crash 
I bought some bitcoin at $500 a few weeks ago. I have made some profits. But I will not take the profit. I will hold them for the long term.
I did the same. I keep on buying the bitcoin when there is a price dip in the last two years, it seems it is a good strategy.
The bitcoin price has risen about 20 dollars in the last few days.
So it was quite good to buy a few days ago. It is better to hold them for long.
The price of bitcoin dropped again to $570. I think it will be fluctuating around the current level for some time.