Rare coins aren’t originally sold as “collectibles”
They become collectibles by chance, either by misprints or rarity.
It’s true people collect coins, even I have some Kennedy and Eisenhower coins but I doubt I’d get more than face value of them today.
I've owned graded Mint State coins in the past....and made money trading them. I still have a few.
I also have quite a few silver rounds.
FWIW