NEM dump so much, because NEM team has bad company management, no marketing, only promises and fail deadlines, that's the reason. They do meetings in Nigeria, Ukraine and another 3rd world countries, instead of pay attention to USA, Europe, Japan and Asia where real things are done.
Every month they give us a new deadline of release catapult and evey month they fail this deadline. Long Wong's interview: "Catapult release will be in the end of this year (2017)", now is May 2018 and we have blockchain from 2016, is it innovation, is it progress?
NEM project was thrown away from top10 coinmarketcap and that isn't the end, at such temp we will be even lower, top50 and then top100, if NEM team won't show any REAL progress.
There isn't any motivation to have harvesting, because no reward, so we don't have any ecosystem of POI in NEM , look at PoW in Etherium, Litecoin, Monero, ZCash what big community and ecosystem they have around their PoW.
Every day I see more and more negative thoughts about NEM in world community and russian comminuty. There are reasons for this. It's not too late to change everything in order to solve all these fails.