You say that “new exchange token is worth holding”, but how can you be sure that this exchange will be successful? There are too many exchanges on the market at the moment and new appear every week. They dont bring anything new, so why would be successful and it is worth to pay attention to them, when you can always use “good old exchange”?
KoinPro for instance. Its an exchange token but this exchange hasn't proved anything yet we don't know yet if their exchange will really be that successful knowing there are already exchanges better than them. We don't know yet if there will be volume to this exchange after, they might even be a scam. But the exchange that had been live already with a good amount of traffic from them will definitely have a good exchange token.
There are some of them that only have less than 200K volume but they are still in the business for years, that's a good sign because over time they'd earn more traders and their coins will rise.