I've seen my industry's "shovel sellers" and they've done moderately well. Definitely more consistent than the rest of the industry but in the end they suffer f

I've seen my industry's "shovel sellers" and they've done moderately well. Definitely more consistent than the rest of the industry but in the end they suffer from the same issue as the gold miners: timing. If you don't time your exit from your industry's bubble you can get swept away.