If you look at the charts on poloniex over the last 3 weeks you can see that someone has been buying massive amounts of XPM. Roughly 1 million+$. The price was then tripled (at this point), nearly quadrupled. But soon they will "bury the corpse" and the unsuspecting buyers will eat huge losses while they just made a few million this week with market manipulation. Grats to those that got in early.
Why did somebody spend over 1 m $ to pump and dump dead coin? There are so many over coins with working developers. Who would buy dead coin just because the price is rising?
It was exactly for that reason. They bought it in huge amounts, then announced this shitfork, and near the date of shitfork, they'll dump onto the market. All tactic of pump'n'dump scammers.
Sometimes it is very easy to understand what is happening and even better, what it is going to happen next...