Ignis had a bit bad luck, because only a few days after it was "liberated" to trade at Bittrex the whole cryptocurrency/altcoin market crashed, and "weak hands" freaked out and dumped. The fact that it was distributed as a kind of "airdrop" didn't help here. There is still a "mini time bomb" because it was still not added/rewarded by Poloniex, until this is not resolved the market has not to be viewed as "fully normalized".
Crazy to me that Poloniex still didn't distribute the IGNIS. I mean... I get that it's more work for them. But surely they can't just wait until people forget about it‽
Just implement it - it's not that hard if you have Ardor running anyways.
In my opinion, it will recover when real usage is found. Ignis - because of its superior scalability to other coins - is a good currency for regular payments of goods and services. It is a better alternative to coins like Bitcoin Cash, LTC or Dash. So people who want it to succeed - above all, the Jelurida / ANG team - should try to get it accepted by payment processors.
Dominium is pretty interesting. More Coins like that will come ... my bet is that IGNIS will gain usage because it's the network between all those coins. So I consider it vastly undervalued ... it should be higher than Ardor.
For example, an addition of AEUR to major exchanges (as a competition to Tether) should also bring new users and could trigger a market recovery.
I think the C2C ATMs will use AEUR. Would be great if exchanges would pick it up too. Don't see that anytime soon though.