Foil

Collectible cards trade in a market with real volume and no real structure: thin liquidity, weak price discovery, and no clean way to take exposure to a category rather than a single asset.

The open question is what proper market infrastructure would look like here. Card indices and baskets, prediction markets on index levels, and products backed by physical card exposure — could someone trade a market on whether a card index clears a level by a date, alongside instruments tied to the actual underlying supply?

The interesting work is upstream of any product: index methodology, liquidity and market-maker incentives, YES/NO contract mechanics, the underlying supply, and the regulated-exchange structures this would have to live inside. Those questions decide whether the thing can exist. The interface is the easy part.