I supposed it'll come to an end at some point. My other lifelong collecting hobbies ended because:
1. I had storage problems for the items.
2. There was overproduction for later items that affected my enjoyment of collecting the older items.
#2. wouldn't play a role in my collecting habit ending because each anime's artwork stands on it's own and is unrelated to the newer ones. Overproduction of newer artwork would never be a problem and in fact is encouraged.
#1 might play a role though. At some point I'm going to run out of space. But I also hate to sell stuff.
I'm never going to run out of things to collect because there's always a new anime to collect from. Not until anime production moves completely away from sketches. That would be a problem. My interest would slowly decline from that point.
I've come close to stopping before so imagining my collecting "career" coming to an end is easy to do. When those times came up before, I just switched over to other anime.
If my interest in anime slows down. If new production material ceases to exist. If my storage space runs out. If I have a financial crisis or need to save up money for something big. If I become the resident of a county jail and make a new friend named "Bubba". Any or all of these reasons could make me decide to stop collecting.
Keropi <--- collecting addiction since 1997.