I would look into software that was designed in general for collectors, be it stamps, non crypto coins, things like that.
At a guess most of them could be adapted to work with crypto, or at least give you something that should be better then excel.

The downside, is going to be that you are now exposing what you have. So if someone does not know the true value of your crypto collectable collection. If they see what you have in the app, they will know....

-Dave