You don't have to gather gold coins or invest in them in sort to have them. Several citizens obtain gold coins frequently without having any awareness in them, beside a question they continue questioning themselves: how to cash in gold coins.
There're a few places where you can trade your gold coins: jeweller malls, coins dealers, pawnshops, and certainly you can sell them online. every gold coin or any coin made of any valuable metal has two parts of its value: the gold worth and the numismatic value (for bullion gold coins it can be just a premium on the gold value in percents).
The numismatic worth of a coin can be affected by numerous factors: its position (condition), its mintage (the number of coins issued), and its year of issue (how old it is). So evidently, an older gold coin in ideal situation minted in very small number will value a set more than some modern gold coin in poor situation minted in great number - that simple.