Collecting rare coins and the study of currency can be summed up by the term Numismatics.
Nowadays, a Numismatist would not only have an appreciation of rare coins and historic currency but may also be interested in medals, paper currency and even cryptocurrency.
There is a growing community of numismatists and coin collectors. Some use it as a hobby and are more interested in gathering full sets of coins or finding specific coins that mark a specific time in history.
Others use the study and collecting of coins as a way of investment and preserving personal wealth over time.
Rare/Collectors coins more often than not, retain their value and are more likely to increase in value during times of volatility in the stock market.
There are a wide range of options including limited edition coins, royal mint coins, minting error coins, and collectors coins. If you do enough research and have a true interest in the history of money/currency, you could turn a hobby into a savvy investment.
Numismatics is an area of study that requires a great deal of time and effort. However, if you are looking to make a quick buck, then this type of collecting is unlikely to be the best option for you.
Downsides can be very large premiums on such coins. Fake coins can also be a factor. Make sure to check things like weight, discolouration and size. There is lots of information online about how to spot if a coin is fake or real, so do your own thorough research.
If you don’t have a particular interest in the history of money, rare coins and currency, then that is completely fine. You can still buy coins such as a Britannia, Canadian Maple, American Eagle, South African Krugerrand etc, and still have a great investment for the future.
Whether you are into Numismatics or not make sure you buy all coins from a reputable dealer.
Collectors Coin examples: Farthing, Halfpenny, Penny, Three Halfpence, Half Groat, Thruppence, Groat, Sixpence, Shilling, Florin, Quarter Noble, Half Crown, Quarter Guinea, Half Noble, Double Florin, Crown, Trade Dollar, Noble, Angel, Third Guinea, Half Unite, Half Sovereign, Half Guinea, Unite (Pound), Sovereign (Pound), Guinea, Two Guinea.