Maybe yes maybe no, that coin can be still life or die, that is based on the how developers developing that coin before they left it. That coin will still life but with minimum users and minimum volume in the market because I have seen some coin which ignored by the developers but there is still a volume in the market but not to much like another coin, but if that coin have little exchange or only one exchange I think that coin will be die.
If that coin have good advantages like with really cheap price, maybe that coin will be rise even if the developers already left that coin.