The correct time is when you achieve your set target. And if you failed to sell it because of FOMO, then obviously you need to HODL it again till the time it hits your set target. And this time control your emotions.
Does bitcoin have time to sell. Bitcoin don't have specific time to sell anything, bitcoin is like money in the bank when you have problem or when you something important to do with money you and withdraw. Any time problem come up you can sell you currency to get money and solve the problem.