I don't know who organized this dump but it was planned to evoke the panic sale. It happened immediately after the news of release were published. They are trying to hurt NAV project purposefully. But stay calm, I do not think that they have enough coins to drive the price as low as 4000 sat.
Not in this case! When the Bitcoin was green, other currencies were red. NAV kept artificially high price and sell their coins is expensive, now the price should fall as the other coins. I do not believe in fairy tales, it's time red. View the price in the summer and understand where we are going.