Well considering this is the reason for its extinction as listed by Wikipedia:
The species is considered vanishing or extinct in the Philippines due to polluted local waters or land reclamation projects
I think it's better that as many as possible are harvested for the aquarium trade. Hopefully some fall into the hands of experienced hobbyists to ensure the continuation of the species.
Sadly for some species, their only hope for survival is the aquarium trade because of habitat destruction. This is the case for even some species of wild bettas.