If you do in fact have 10,000 Bitcoins in Casascius products, you personally account for 1/4 of all the active wealth inside them, as a fellow collector I find this extremely interesting.
If you were a collector, you should know about "Roll your own coins". I do not need to own 10,000 individual 1Ƀ coins or even 2,000 individual 5Ƀ coins. I can own a 0.3155111Ƀ and 9 separate 1,111.11111111Ƀ coins if I wanted to (TL;DR? I load my own coins.) Now, part of the reason I'm being purposely vague is for my privacy and protection. The other is because the conspiracy theories are fascinatingly entertaining for me.