Thank you for your message. I apologize for the delayed response and appreciate your inquiry. Information related to the coin can be found on our website, www.boringcollectibles.com. This is our official website, and official offer for the public. The funded coin is a limited mintage of 2,500 coins in troy oz of pure silver, The unfunded coin is the same, however it DOES NOT CONTAIN BITCOIN. These coins are intended to be used as not only a tributary coin, a work of art, and a limited-edition investible asset; it is also a physical bitcoin wallet - It is as secure in such a way that the only access to the contained value, is through physical redemption of the self-destructing hologram on each coin.