@Khahan I have to agree 100% on the insurance thing. I also have a personal collection policy in the $35k range in it is literally peanuts compared to the rest of the bill (I have HO and car policies all through the same policy so the collection insurance comes out like a couple dollars a month.)
The other thing about HO is it doesn't cover any property that is outside your home. So, if someone breaks into your home and steals your cards, you can collect, however if you bring your cards to an event and they get stolen, they were outside your home and not covered.
Like you said, what is a couple dollars or even $10 a month when your collection is worth 1000x as much.