Buying a coin for investment is a risky business.I have both failed and succeeded ,luckily more the latter.I have done well with favorable exchange rates and in depth knowledge of a series.Eye appeal is a big factor,if you like it the chances are others will.
Colin of Aboutfarthings will be publishing a book on farthings soon (won't you Colin ? ) This will ignite the 1/4d market and make me a copper/bronze multi millionaire.
I only have 1 sovereign at present because I flogged the lot when gold peaked,I could not ignore nearly 400%.I've still got pre sovereign gold (not much) but the coins are not so tied to bullion I also prefer them.Flipping coins is a skill which Declan has mastered.At one time in the Thatcher period I joined a syndicate of fellow Q.S's who gambled their VAT £ or surplus funds on the stockmarket.It became common place to take a 15% profit....lets not talk about losses. I also follow my unit linked pension funds and have gambled with these. Investing for profit in any field IS a gamble.With your own knowledge gathered from various sources you can increase your chances of getting it right. Before Coin news there was a publication called Coin Monthly and I remember they did a Top 10 of coins to invest in...Boy did they get it wrong.
Coins I can honestly say I collect for pleasure and financial benefit is a bonus.