Yes indeed that the only permanent in bitcoin is the constant change. Change is inevitable to the bitcoin system especially its market price and this is why many people are taking advantage on this change as this will lead the opportunity to get profit. Being wise is a choice and those people who got good profit in selling their bitcoin from buying it low and selling it high was the best thing being done. As of this moment the bitcoin market price is still soaring high and many will be going to have a decision later on if they will sell their holdings or to continue to hold it as long as the bitcoin market price goes high. Somehow there are other investors that will sell relatively without the consideration to get more profit in holding and will regret in the end. So to those investors out there do hold your crypto and do not sell yet because bitcoin is constantly changing from time to time and it is still in the increasing period.
I definitely agree to that, the market price of bitcoins is so far getting higher and many people who invested in bitcoin in a lower price are now taking advantage of it by selling it and getting a much profit. And for that it is a good strategy for those people who wants to earn more and maybe lead them to get richer and richer.