Wow, even if the Bitcoin will collapse (which is very unlikely) these Casascius physical bitcoin will be worth a lot! It's like a piece of history there or it can be compared with a rare painting. I wish I had owned any of these and I don't think I would be selling if I had one, even for a big amount of money. I just understand the people having these and not selling them. Thanks for sharing, I didn't knew about Casascius physical bitcoins till now, but I will keep reading about them, maybe someday I will have the occasion to hold one in my own hands. At least I can dream about it :)