Day after day it becomes clearer who invested their life savings into ETC, the very same people that missed early ETH. And now they realise ETC is PnD, so they're getting desperate, day after day. And eventually after devcon they'll see ethereum at 20$ and that'll be the last drop and they'll know it, that'll be the day when they'll realise they'll die poor.
You might be right. But there is big dump of the ETC at the moment. It seems the Ethereum Foundation does not want to kill it now.