I think collecting is fine as long as it doesn't damage you or others financially and you are not emotionally dependent on it.
This is too vague and I must disagree on all points.
I admire autists and despise half-assers. A hobby that's not half-assed will cost you something, and people will view it as "financially damaging". "Others" can get fucked or not depending on who they are. "Emotionally dependent" is a globohomo medicalist dysphemism for "makes me happy".
The two most important rubrics for "collecting" are
what it is you're collecting, and
what you're doing in the process (to obtain the items, and with the items after you have them).
Kevin Gibes is the lowest of the low on both (he opens his email and clicks through to pay for whatever the email tells him to buy).
Another bottom-tier example is the recently featured in the news Limited Run Games, which tell its simps about some of the items they sell, "Missing out on this release will not compromise a complete Limited Run set".
A bottom-tier mentality: I wanted to look up examples ("what objects people collect") and got google hits like
"30+ awesome things to collect as a hobby"
"246 cool things to collect (collection ideas)"
"26 of the best things to collect -- Here you'll find plenty of inspiration..."
A third, parallel rubric is
profitability. If you're actually making a killing in real money reselling funko pops to the likes of Kevkev, more power to you.
Here are some ok/good examples:
- guns
- minerals
- plants (cacti, orchids, violets, bonsai)
- bitters and other alcohol which can be stored open (rolling collection)
- quality fountain pens
- cat figurines
- tarot decks
- anime garage kits
- Yixing teapots
- books on an autistic topic
- international editions of Harry Potter
- photos of graffiti with geoposition
- bread recipes that you then use at least once
- (if you're in or near a bughive) high culture ticket stubs or alternative memorabilia from events you visit
- local history museums memorabilia
- celebrity autographs that you take
- finisher medals from races you enter