Some consider it as childish Photography, some others don't even bother to get involved with because it's too "easy" as they say...!
But really is it? You cannot really control the smoke while shooting so whatever the result is you've got to work with it.
I personally see things, figures, and objects though my smoke images. To emphasize on them, I'm trying to paint them with different colors most of the times.
Maybe we don't see the same thing...it doesn't really matter! Just let your imagination free...

License:
Primary NFT holders are free to use in advertising or parts of merchandise, including but not limited to, t-shirts, tote bags, mugs, advertising, promotion, brochures, packaging or as part of a commercial website for promotional purposes. Also in the use for prints, posters, flyers, tear-sheets for promotional purposes (not for resale) or prints, posters, or other commercial display of Media magazines, books, newspapers, other printed publications video, broadcast, theatrical.