I LOVE THIS! The only thing I dislike is how super confusing it was to initially start buying/making a card or figure... if I had to change something it would have to be cleaning up the interface and maybe helping the user through the first steps a bit more. Right now you have to have a pretty good bit of knowledge of crypto to even understand the process. You should explain it a bit more to the user. Heck, I was confused at first!
I think you have something really big on your hands, this could be a huge thing. I hope you continue working on this and getting some serious marketing behind it.
Will there be exclusive, official, rare cryptibles for us early adopters? ;)