Or the metal it’s made from:
The Royal Mint has launched a £50 coin, but the value of the metal is much lower
The point of fiat money being, rather, to make a profit from the seigniorage.
Back when I lived in the UK I used to make a point of getting these new issues from the bank at face value and going and spending them. Partly just a bit of amusement, talking to people at tills ‘n’ stuff. But also, near the entirety of these coins would never circulate. So, the very few that did might well become, in time, worth more than the uncirculated mint ones. And I was just doing my bit in seeding this market.
Selfless I am, selfless.