All this is guesswork. We know that both GT and PC had a lot of options and shares, and I am personally quite sure they sold some - to exercise options, but also to enjoy life. Me - and I guess they know that owning some hundred K shares will make more then enough money needed to spend a happy life. So I have no problem if they sold and just keept half or 20% of their holding. The age is one factor to help to decide (Well well, I also know and understand :-)
On the other side, who is now selling daily @ or below 0,3??? My guess is that it is one big institutional - or privat investor who lost feith during or after the PO. There are other investors of the size of e.g. Mazan, no doubt, not everyone is @agoracom.
But finally - it is like it is, and it will not influence my strategy to stay long(er).
Cheers, TF
