I think k at this period in time when bitcoin is witnessing a blood bath in it price it better not to sell rather you should buy, there have bee. So many threads that has treated this before and the advice has always been the same which is don't sell out of panic and there have never been a universally acceptable time to either sale or buy bitcoin since such actions is individual decision to make.
seeing the current situation, I think that many people are holding back the bitcoin they have today. well we see that the price of bitcoin has fallen so much this year. but, I think in the near future things will get better, and that will be the right time to sell bitcoin if you want it.