Imagine if the United States Government were to issue a Billion Dollar Bill. It would cost you $1,000,000,000.00 and would be the world’s most valuable bank note! Now, you can indulge your fantasy … with the 2008 Billion Dollar Golden Proof that’s crafted in over four ounces of .999 pure silver and richly layered in pure 24 karat gold. To assure its rarity, only 10,000 Golden Proofs are authorized.