Yes we need, the vol at bittrex is much, much higher than at c-cex. If we want to have a signifficant vol, we need bittrex.
I also thought, that we do not need, but unfortunately @roynin is right.
Without bigger exchange, it will will not be possible, to affiliate more people with PYRA.
So lets ask other exchanges to add PYRA.
You are right. Bittrex is one of the most popular exchange last time. It has very big volume every day (maybe the biggest ?).
If any coin want to make progress, it needs to has more that one exchange.