I'm less certain than you.
I think I read somewhere that people collect old stock certificates for the artistic value. Just checked eBay and there appear to be thousands for sale.
And aren't baseball cards art? Wouldn't Andy Warhol say they are?
Manipulating financial instruments can be art!
"[Sarah] Meyohas traded stocks on the New York Stock Exchange then, in real time, drew the changes in the stock’s valuation with oil stick on blank canvases throughout the gallery. The line, value over time, is an index of her movement, physically in the gallery and virtually in her ownership. Each painting is one of many financial records, but unique as an artwork."
She also has sold crypto tokens redeemable for her work:
"Similar to Bitcoin, one Bitchcoin, is worth 25 square inches of any one of Meyohas’ photographic prints. The value of each coin fluctuates with the increasing value of the artist’s works. ‘BitchCoin asserts artistic agency as an economic claim,” Meyohas states, "This is important for artists when art is viewed as a cultural capital"
"...when you purchase one BitchCoin, you receive a certificate with an encrypted number, which can be redeemed at any time for a physical artwork. Purchasing a complete print requires 25 BitchCoins, which comes to $2,500, but any print can be exchanged in the future for another print."
https://news.artnet.com/market/artist-invents-bitchcoin-a-ph...