Ha! You avoided the question.

You don't need to imagine remote areas of the world. Back in reality, we do have exchanges where cards are traded. Among collectors they will even directly trade cards for other non-pokemon goods. Some form of value clearly exists, and assessments of that value are (mostly) shared between participants. However, outside of that niche, pokemon cards have no value as "money".

We don't even have to use silly examples like collectable cards, you can also look to stocks and bonds. Stock exchanges are a large participant in modern financial systems. Enormous amounts of exchanges happen in routine and standardized ways with little friction. And yet, despite all the utility have have in the finance system, stocks, bonds, etc have limited utility as a form of "money".