The whale purchase was because of the meeting: the officials passed some good news to the foundation people and they made the whale purchase.I think it's other way around:
Officials had nothing new to say to bitcoiners. Government talk to bitcoin community not by chatting on meetings but by issuing regulations and making seizures

The purpose of the meeting was not to
pass some information to the BTC people, but to
get it from them.
Therefore: the whale was not a bitcoiner, but one of the officials. After the meeting he decided to invest his personal money in BTC. And he has vested interest in BTC now.
tl;dr: The whale is our new secret ally in the enemy's camp
