There have been multiple attempts at this. None have ever been successful. https://en.wikipedia.org/wiki/Digital_scent_technology https://en.wikipedia.org/wiki/

There have been multiple attempts at this. None have ever been successful. https://en.wikipedia.org/wiki/Digital_scent_technology https://en.wikipedia.org/wiki/Digital_scent_technology https://en.wikipedia.org/wiki/Scratch_and_sniff https://en.wikipedia.org/wiki/Scratch_and_sniff Novelty items at best, I can't imagine any VC getting excited about this stuff. But I didn't imagine they'd get excited about crypto either :)