There are circulating legal tender or CLT.
There are non-circulating Legal Tender or NCLT.
There are circulating non legal tender ot CNLT.
There are non-circulating non-legal tender or NCNLT.
Then there are trade goods used as money such as sea shells, bever pelts, whiskey,
canoe money, axes, knives, beads, pins, mirrors, guns and big rocks with holes in the center and not to mention those hard to get error rocks with no holes in the middle. Opps! I guess these are
CNLT except the rocks, I don't think the big ones circulated much.
Bullion, it circulated once upon a time and once upon another time it didn't. It was legal tender except when it wasn't officially declared by the uppity mucks to be legal tender. In some cases the stupid peoples who didn't know any better circulated it anyway.
My friend, at work, the other day traded a auto engine for an upholstry job on his motorhome. Excellent example of NCNLT working as money.
I collect what I like, don't care if it is a coin or not, no longer care if it is generally accepted as a fit catagory of collectible or not, I am getting tired of hiding my NCNLT collection of pewter wizard figurines.
Dale