I've been crafting in MMOs for more than a decade and this fear always arises, almost never worth the stress. The worst was WoW where there was so much fantastic top-end gear there was no market for crafted, really. The best, for crafters, was DAOC where it felt like a full time job to level up and then they, too, eventually added superior gear through quests, drops, etc.
The thing is, the vast majority of people running around skilling up their crafting won't max it out and/or won't bother selling the items they can make. We'll go through a phase of over-priced stuff, then under-priced stuff then high end gear being costly but reasonable while twink gear sells for more than ever.
It's a fairly predictable progression.