>>6109815The key is to avoid hoarding and to prioritize. As long as you are functioning (all bills paid, savings set aside, took care of family and yourself in regards of food, health, hygiene, clothes, appearance, some socializing etc.) it shouldn't be a problem to spend your disposable income on a hobby of your choice.
For some people, and I believe that includes you, the hunt is far more enjoyable than actually owning/keeping something. So I would suggest you organize your collection in some manner, whether it be by date acquired or by favorite character, and start selling the older/less important ones. Set a reasonable price (among the lowest available on ebay) and then for every two/three figures you sell you allow yourself to buy a new one. Also try switching your interest between different toy-lines and don't collect too many at once.
Once you open a new figure, try keeping it close or on your desk for a few days, pose around with it, try setting up a diorama, make props and take pictures (it doesn't need to be anything professional, just something funny you can look back on which will make you feel like the purchase had meaning).
Keep a max. of 20 figures displayed and the switch them out every few weeks (keep the ones not currently displayed in their original boxes to make it feel like they're new when you take them out again).
The worst you can do is get buried under your collection to the point where it becomes a physical and mental burden and you end up being unable to enjoy a single figure.