I think, most likely the main real reason for the decision was the insufficient from the point of view of the exchange, the volume of bidding XEM.
Weak hands are losing, strong hands take )
Its good time to buy?

Not at all. I mean that at a short distance you can earn well on fluctuations in the course. Directly at this moment when I write the price rose by 26%.
UPD. In a few hours +38%.