ninja mined coins are not in circulation (in masternodes) and there was a supply reduction.... of course it will increase in price due to lack of supply 
plus POS masternodes encourages locking coins because you earn interest...less coins in circulation, the rule of "supply and demand" follows.
plus POS masternodes encourages locking coins because you earn interest...less coins in circulation, the rule of "supply and demand" follows.
Yes, Dash has a track record of making development decisions that make the coins people own more valuable.
When the next such development happens, I guess people who don't own any will moan about that too?