Beyond the premium of a coin, say a few dollars over for a current year 2023 silver eagle, appropriately 30-35-ish dollars right now. Numismatics, yes. Some people collect coins for different reasons. Errors, rarity, low mintage, etc. I have a few errors, but the low mintage coins... Say one of 1,000 made? Take a set from Mexico, silver Libertad proofs (super shiny.) Can't find how much they're worth by searching, cuz they're one of a thousand. No one resells those, or they resell say a few hundred over just after original sale They just sit in private collections until someone passes or they really need money. Those sets are fairly coveted sets. Libertads used as an example cuz, the bullion, coin collecting community kinda went nuts for Mexican Libertads after the 2020 low mintage. Beautiful coins, but otherwise, just bullion. Like American Silver Eagles or Canadian Maples.