That is a fair point, I completely understand your judgment and now agree with you on this matter.
A good compromise would be making it like the D1, turning only one drop in the room into gold, but it's your call man.

I tested but didn't really like it, if there's multiple bombs/keys in the room they become useless, sure you have infinite that floor but it's annoying to pick up 4 gold bombs and start the next floor with 0 bombs, which meant you would hold the card for a room that had only 1 bomb and key and if you got tired of waiting and spent it on a room with 1 key, then in the next room you get a key and a bomb it's annoying, maybe that makes it more balanced but I wanted to make something strong but rare, I wanted it to be a special reward, not annoying

plus it was easy to get a ton of money by saving the card for a room with a lot of hearts in it, after testing a while I pretty much just used it that way not the way it was intended, since then I could get much more out of shops, maybe having a varying effectiveness based on how long you want to keep it is better but I decided to go with something that you shouldn't have to wait to use and would always be as effective regardless of the room

Such a missed opportunity, you could have called it the golden Ace and make it turn every pick up in the room into its golden counterpart...

Gold Card + Blank Card = Endless Resources

is incredible

card

Is it a pickup or an item?