As long you earn income from selling bitcoin maybe its the best time to sell. But, in the current condition of the market, it is advisable to sell your bitcoin and the good decision you can make right now is to hold or to buy more bitcoin. Even bitcoin will fall down some investors are have a strong hand where they will still hold it than selling it because I know they will regret in the future if they going to sell their bitcoin right now. Try to be more patient and just wait until the price start on rising.