There are 3 reasons why I do not buy coloured coins, like the coin (Junk) shown below.
A serious collector would never and I mean never have a Mickey Mouse, or Star Wars or any other Coloured coin that is just a promotional tool for the film or cartoon makers, there is no history in that coin at all.
These coins are for children and the mentally deranged, they are a toy.
The most important fact is, if you look at the American Eagle below there is one major difference.
When selling you will get more for the American Eagle 1oz Silver Coin, than the Mickey Mouse 1oz Silver Coin.
The Mickey Mouse coin is Not a Pure Silver coin as when it comes to melting them down the American Eagle is 999 Silver so is easy to melt down, the Mickey Mouse coin has paint on it so you can not melt the coin down with say, a 1oz Britannia, Maple Leaf, and other Silver .999 coins because it will make them impure.
So when coin are melted down the American Eagle can easily be melted down with other similar cons, but the coloured Mickey Mouse coin and others like it would need to be melted down together to get all the impurities out, taking a lot longer to do.
If your buying bullion never buy coloured coins as you will get less money as it takes a lot longer to get it back to .999 silver.
When it comes to choice and a scrap dealer can buy 100 American Eagles or 100 Mickey Mouse coins he will go for the Eagles and offer you 20 to 30% less for the coloured coins.
Coloured coins will be the loser every time.