Numismatic is the official term for a rare or collectible gold or silver coin. These coins have much greater value than just the gold or silver content. Reasons for this include the year the coin was minted, the condition of the coin, the number of coins minted, and if there is historical significance behind the coin. Numismatics  tend to be rare and can be very expensive and must be minted prior to 1934. As such, they are non-dealer reportable and non-confiscatable; numismatics ensure complete privacy. You should invest in numismatics if you are a collector or if you are willing to take more of a risk on an investment.