Dont sell everything,just sell if its important. Or just sell half of all your bitcoin and the other half will be use in the near future.
This is also a good way though because holding all your bitcoin would not be good on bitcoins ecosystem and thats why we need to spend some of it to contribute on the circulation, As of now bitcoins price started to rise and its a good time to sell your some coins on the price point especially to those who bought on - $600 price.
but its still fluctuating and price still moving up if you are planning to sell just sell it on the right timing not now because it is still moving well or like what other said just sell parts of it but not all because you will have to get a hard way placing your entry back if you plan to buy again.