I think Bittrex will sort it out soon, they tend to leave things a bit to make sure that there are no problems, it was never going to stay up at the $20 levels this long, might go back up long term but at the current price it doesn't really matter when we get them or not as it's not worth dumping at this level unless you need to cash now, holding for a bit makes more sense.
Sure don't worry. Bittrex is VERY busy with scaling problems right now, be patient. And NXT showed itself as very good project, IGNIS will be good too, I'm sure.
I was under the impression Bittrex was far and away the #1 exchange worldwide up until a few months ago. Just after the BTC-e fiasco, people started reporting having serious withdrawl issue from Bittrex.
I can't speak for everyone, only myself, but if Bittrex were to steal everyone's funds, as one of the most used exchanges globally right now it would set Bitcoin back by 1 year for sure (at least).