Nope. Those came from the begging skill on NPCs, you got a pile of gold, if you drag it, its a random pile of an amount of gold, but not really the amount of it (like 61'271 gold in one pile) and it just has the name "gold coin". You cannot have another pile of gold in your backpack, it just messed things up. As of today, I'm not sure this works anymore (I don't think so).