I don't know how much crossover there is between guys who like knives and guns, but I'll bet there's a significant correlation. The vast majority of my "fun money" has been spent on guns these last several years, and depending on how the 2016 presidential elections go, I submit there will be another substantial uptick in gun sales, meaning there will be less disposable income available for nice knives. I don't know how much that impacts our corner of the world, but it may make it harder to draw in new collectors from related fields.
I've been on an axe & hatchet kick lately. Don't know if anyone else has seen anything developing there... or if maybe someone should start a new trend. There are still custom makers doing tactical tomahawks and traditional pipe and throwing 'hawks, but very few who make a really nice traditional hatchet/hand axe like those between about 1890 to WWII.