Haven't this past few days thought you something! you can at least take 2017 as a case study, you know what happened after btc famous ATH, people bought at 20k and some of them did not lose hope and continue holding, recently btc was as high as 19k+ which to me was a good price for those who held for so long to sell and buy back below,
the point is, this is a correction after the price pump, selling now won't make any sense unless you are sure it will dip even lower to buy back, otherwise just hold and relax.