Watches, wines, designer anything not made by AI. Check out episodes of Star Trek: The Next Generation with regards to exploration of ideas of value when goods come out of a replicator and experiences out of a Holodeck at zero marginal cost.
I feel like watches and designer good could be easily designed by AI, no?
If it comes out of a cold lifeless machine and not the warm hands of human craftsmanship, is it the same thing?
Perhaps 'The Neutral Zone' season 1 episode 26. There is a cryogenically frozen person brought back to life, and he is obsessed with finding out about the value of his stock portfolio, and he and Picard have a conversation about how money no longer exists.
But I don't recall any episode that really explores the idea of a post-scarcity world (which is essentially communism I suppose)
The bragging is basically a cultural think in your circles so no i dont see them becomming that.