The Canadian Mint makes all is their commemorative coins and such with a denomination. For example this $2500 denomination gold coin. https://www.mint.ca/en/shop/coins/2026/the-jack-pine-by-tom-thomson-1-kilo-pure-gold-coin
So there are non-circulation coins of all sorts of is values. Mostly they are worth more than face value as collected items. But sometimes they are worth more as their face value or as scrap metal. I had some $20 Silver coins that I took great delight in spending as my friend got them for $16.
I think they do it so that they cannot legally be melted down for materials. As defacing currency is illegal. It also prevents them from droping in value to far as they have an intrinsically assigned worth.

https://www.mint.ca/en/shop/coins/2026/the-jack-pine-by-tom-thomson-1-kilo-pure-gold-coin Here is a Canadian $2500 coin.