While not every proof set is worth a mint (forgive the pun), there are a few that fetch thousands at auction. If you know ...

“The Royal Mint has been regularly issuing Annual Sets since 1971 and they have become ... to the coins for their historical and numismatic value, though it might be a while before they see ...

The Executive R0AR Society (ERS) collection of 10,000 NFTs on the Ethereum network will begin its public mint on January 6th, ...