A bit off-topic: But I've actually always liked the idea of a blockchain based trading card game of some sort (Not like those scams that have plagued CT over the years). A card game that you can actually play, like hearthstone / Pokemon oneline / MTG online.  People buy your tokens to spend of card packs, collect them in their wallet (Deck), the rarity changes which could theoretically increase value.

However, it needs to be entertaining and interesting enough to collect. This is just me thinking out loud BTW. I much prefer a more serious project based on private message / email.