Next to other points the selling might also have to do with the intention to remove POS from this Coin.
I never understood at first place why you choose a POS coin since I too see POS as an unhealthy thing when it comes to financial fairness and equality however my longtime investment plan in this coin is to a significant part driven through that POS.
Getting right of it simple means that I and maybe others have to change to other coins. I didn't sell any of my FairCoins however I asume that a part of the selling we have seen is because of the reduction in longtime attractivness.
I know that this Coin will still grow in value however that grow is not something you can plan and that makes it troublesome for investments.
To all worry about the price drop. We are still in good waters. From past obeservations coins that rose very heavy fall often back to about 30% of its peak and that is where we are now.
I too wonder who is actually really selling if it's still one or more ppl from the early distribution or some that bought the last weeks and forced the a bit unhealthy strong rise.