Not All Hobbies Are Priced Equally
There's no denying the fact that some hobbies can be absolutely instrumental in instilling a deeper level of balance in your life. Without a hobby or two that you can sink some of your time and/or financial resources into, your life can spiral out of control when it comes to healthily balancing work and pleasure.
With that being said, this AskReddit thread certainly provides its fair share of the more financially hefty hobbies that you might find yourself intrigued by. By all means, if you have the resources to stock up on a multitude of coins that could very well mature in their overall value over time, then definitely do so.
(Just remember that some collectibles wind up being worthless in the long run.)