As long as other exchanges dont pick up GRA, its not a problem.
I guess,
PoW/PoS coin has long life time than the other coins,
But, not easy to growing quickly even it is in exchange market or not.
and, I think, it is the problem which has made by the wrong and buggy infomation from the valuation site such as Coinwarz.com
They just calculate the value of coin base on BlockTime/Reward/Difficulty only.
In fact of PoS/PoW coins can not be valuaged with that way,
So, the calculated value is shows much higher than actual value,
(1) when new miner join in to mine base on that infomation, they feel this coin has some problem because of practical gain is much lower
and make them leave the coin
(2) the bubbled estimated value make the coin value is drop in the exchange market. such as the value of coins shows as 1000 in valuation site, and the average price is 300 only.
and than, the buyer feel the price of this coin is over priced. but, actually, the practical mining gain is even just 300.
Most of miner do not want to know about detail of coin,
and, they rely on the information from the estimation sites.
It is a kind of critical issues for that sites,
To avoid this conflict, I have thought,
even PoS has involved, PoW block time should be matched with the officially announced number.
Anyway, the join in Exchanged Market, it will makes difficult to the current miner,
but, if just small number of miners own the major part of coins,
the future of coins should be dark ~
Maybe, It is too fast now, but, I think this coin should be going into the market more and more
and, more miner's have to mine this coin
BUT, if this coin go into CoinWarz or that kind of valuation site, This coin will got so much damaged due to their wrong infomation,
Actually, I am worrying about this situation more, ^^
Just my person guess...