Brainiac
Super Freak
I agree completely, on the first point, when it comes to addiction its easy for some to find the willpower to stop, for others its possible, everyone can do it. With regards to your other point if there are other aspects of your life financial or otherwise then I would hope they take priority if necessary because after all this is a hobby, not a necessityJust stop collecting. It's really that simple. Self-control isn't hard to learn and practice.
They're good figures but I'm pretty sure your life has other priorities.
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That being said I think the OP is talking about quitting when you feel you are done or you have gone far enough in the hobby where you can be satisfied. Its quitting something you love doing, not so easy imho, but you recognise that theres not much more for you to gain from it