May some day this noncirculating coins in my wallet be worth anything? May them have a future collectable value as happens with real old coins?
Unless the dev plan on reviving the coin and restarting marketing from scratch it's a long way to go. That was if it happened, and in the end the conclusion would be difficult and never to return. Maybe with a new version or with a customized development at this point. If it has no value now, it means that the coin you hold has been abandoned and no longer has a bright future.