DASH is half POS and half POW ( to be precise: 55% POS - 45% POW ) coin, so if we talk marketcap, it is far from top 5.  But that is not the problem, problem is that it is sliding down...
For MN owners that got in long ago it is not so big problem, but user base can not sustain on MN owners only. So DASH is becoming MN owners group's coin. Furthermore, miners are weird group, who they are really?