Hmmm, I like the idea. A lot! It's a sort of folding Smatchet. But I have one problem. I assume that you would want to sharpen both edges, and that would present a real difficulty when you go to carry something with that kind of sharpened belly in your pocket or even in a holster. It would appear to be a sliced hand, or other portion of your anatomy, just waiting to happen. And I doubt that any company would want to make it due to legal liability matters. But I am not a lawyer, etc., etc., etc.
Now, if we can come up with some way to guard the sharpened back of the blade while you carry the knife, we might well have a winner here.
BTW, my only problem with a spear point "Chinook" is using the name, "Chinook". That is the name of a very specific device, just as "Gunting" is the name of a very specific device, or "Sifu" is. Somebody once asked about a 3 1/2" Sifu, and I said that REKAT already made them, they were called Carnivour and Carnivour Cub.