Ok, so I know what a private key is and everything.. but what do you mean by the bolded text above?
In most cases you peel the coin to reveal the private key. Thus the coin's creator created and printed out the private key to insert in the coin behind the hologram. If they were nefarious they would just keep a copy of the key and cash it in a few years down the line.
So in your opinion, Casascius's coins are the way to go for the best bet of potential profit/return in the future? Do you know how many coins Casascius has made in the past while he was still making them, and how rare is it to see a Casascius coin being sold on the market place?
http://casascius.uberbills.com/This will tell you all about the Casascius coins.
Also here -
http://www.spotcoins.com/bitcoin/casasciusThey pop up for sale often on the goods and auctions section on here.
And yes, I think they're by far the best investment option for a physical coin. Nothing else has the same pedigree. Even if Bitcoin itself became totally worthless they'd still have historical value for what they are.
