sell and buy back is best method to minim your lost 
but sometimes hold is best solution for long investmen
Long term are the best factor which are found in some people so I would tell you that long term investment can you give more things while short term can you give you short things like daily life usage and long term usage give you a car or luxury goods so I would say that having long term option then you will have more bright future in the upcoming days. but sometimes hold is best solution for long investmen