I suppose I’m more wondering whether or not people think it’s worth keeping in the collection for display and potential resale later on or if it’s not going to increase the value that much to just go ahead and use it.
It all depends on what kind of knife buyer you are.
I own a lot of knives (all cheap ones) that I use but I never use any knives that I buy for my collection. All of my ZTs are for collection only.
I have only sold a few of the ZTs that I've purchased and none of them appreciated much (if at all) in value.
However, profit was never an expectation in the purchase or sale of any knife that I own or have owned. I only sell knives if/when I decide that I no longer "like" them and no longer think they deserve to remain in my collection.
So, regarding the 0308, IMO you should keep it in your collection for as long as YOU "like" and sell it if/when you don't.
No one knows whether any knife will increase in value or not but I'd speculate that the 0308 will NOT appreciate (if at all) at a rate greater than the value of older and more popular models, like the 0200/300, which have really not appreciated all that much beyond their original issue prices 10-15 years ago.
The only ZTs that have increased substantially in value are the limited release factory sprints and/or customs like the 0392, 0600, 0606 0777, 0888, 0999.
Every knife will better retain its value (whatever it is) if you DO NOT use it but, if you have no problem w/the likely reduction in the value of the knife if it is used and (like many other members here) think that its foolish not to use a knife that would be an excellent tool, then use it.
So, whether you decide to use your 0308 or not depends on: 1) whether you NEED/WANT to use it or not AND 2) whether you are willing to give up whatever reduction in value in the knife that use may cause.
If the answer to both of these 2 questions is NO, then you should just sell it and move on.