This is another completely subjective question. It all depends on what price you bought Bitcoin at. Ignore the price you could have got if you sold it a few months ago and look at your ROI to date. Are you satisfied with the return? Do you think that the price of Bitcoin will drop further? Do you need the fiat to invest in other coins that you feel could give bigger returns? If the answer to any of the above questions is yes, then you have a good enough reason to sell. If it is no to all three, then it is probably better to hold for the time being and see where the market goes. Keep re-evaluating and make the decision on your own situation, not on other people's situation.