If its some kind of coin company then if it was such a good investment they would keep them and not look at selling them.
Then again who would have thought if you bought some shares in Apple back in the day you would not be paffing about on here but on your mega ship with helipad and a good looking younger model sunning yourself somewhere warm.

Collecting (even individual items) as an investment is a mugs game unless you absolutely know what you are doing and quite probably have very deep pockets -pockets that you need to be prepared to be emptied. Alternatively you need to be a dealer in collection items.

Fads change and with them the value of collections. Once upon a time stamp collecting was the thing and while many hoped to find one of those rare misprints worth even then 6 figure numbers, that was well beyond the average collector. They were encouraged to specialise - stamps from one country or first day covers (stamps postmarked with the day of issue). For a number of years such collections could be seen to have increased in value. Today many of those collections are worth less than the face value of the stamps. Philately has largely gone out of fashion and while the truly rare items still have large value, more mundane collections are close to worthless.

Some fine wine collections have similarly gone down the tubes.

My own collection of modem railway items* shows how easy it is to fail to make money as an investment. (* I don't look on it as a collection but rather models purchased or made for my projects but I am sure that anyone else would see it as a collection.) I have models that have increased greatly in cash value should I chose to sell them. I have models that within a few weeks of purchase could have been sold for several times the price I paid. The manufacturer failed to judge the demand leaving some disappointed modellers/collectors trying to outbid one another to get the model. And when I say collector, there are genuine collectors out there searching for the pristine model, ideally still in its unopened box. I have seen the price of such high value models drift downwards as the demand from the relatively small number of disappointed modellers is sated or the desire for such models changes as tastes change over time. I have seen the value of such models fall off a cliff as a manufacturer determines that there is true demand still for his model and reissues the model.


So my advice is if you want to collect for pleasure then enjoy. It can bring enormous personal pleasure; but if you want to invest by collecting, then you had better know exactly what you are doing. And if you rely on a newspaper or internet article to advise you, you probably don't know what you are doing.