Collectibles are tricky. A relative of mine valuable collected oriental rugs, and also a certain other type of antique. After his death, it became apparent that as a store of value, they were very bad. The rugs lost value, also many of them had moth damage. The other class of antique that they had - it became unpopular. Nobody wanted it. So - you may get lucky with the collectibles. I would never bet on them, though.