Adding coins to multiple collections

As the title says, it would be nice to be able to add a coin to multiple different collections. Would this be possible or is it unreasonable to try and implement it?

Regards.

I'd love it! I hate, for example that i cant put a coin in both my “cool coins” and “silver/billon” collections.

In my opinion it would be a great addition.

Yes, I've been wanting this for a long time! E.g. I have both “WWI”, “WWII”, and “Silver” as collections, and – believe it or not – sometimes a silver is also from WWI/WWII.

Hello,

I'm closing this discussion, as the idea is already tracked at https://en.numista.com/forum/topic101564.html