The guy who owns it is called Jerry, he hasn't been active on YouTube in a while tho... so I guess he lost interest and his coin got attacked.
That's what all the evidence points at.
The difficulty keeps going back to 1, rising slowly to about 800, then back to 1 again. Coins that were mined keep vanishing indicating someone is forking it over and over again.
The exchanges that had this coin on will most likely have to either create their own fork and continue the coin with only the oldest entries that were mined fair, or they will have to tell the owners that their coins are simply lost.