If they dump all their Karma they lack vision...
And in the end it is very good for all the rest of us that big holders dump... more cheap coins for us.
I regret not having some low price buy orders in MINTPAL... Today I would feel very happy if I had bought millions of Karma coins for less than 50 satoshi!!!

Do you want to know my personal theory on yesterdays dumping?
Someone with a lot of Karma (probably more than 2 billions) started to feel uncomfortable about having so much Karma while uncertain about the nature of the announcement today.
So he just decided at the last minute to sold enough Karma to put him in a situation where he had profit with his Karma investment no matter what happens in future.