1st.
This is also the very first time that I've heard about Polis.
2nd.
The feature that it offers isn't different from the existing and third party services that we have today.
3rd.
Why compare something we don't even heard of to Dash which is commonly known and popular ever since?
Though I have heard Polis before but it doesn't come close to the popularity of Dash. They will have a long journey to even compete with Dash in the market. Just looking the overview between Dash and Polis in CMC will give you idea how far they are -
Dash - Rank 20 vs. Rank 384
vs.
I am not considering the markets that they are listed with. But if you will check both of them. Dash has a lot as compared to few exchanges for Polis. So nope, right now, Polis has a lot of things to do to even achieve half the popularity of dash.
The price or the position on the list is ok to look at and compare, but when you look at the volume it's lik David fighting Goliath. Maybe if Dash dies for some reason or gets banned here and there, or has some critical bug Polis can overtake it but with that volume there's obviously not much interest in this coin.
I heard about this coin because I was for a time interested in PoS coin but most of those coins are pure speculation with no real use. They can claim to have partnerships and such but there's a long way from enabling payments to people using them.