@edward.maesen - I am glad that someone finally noticed and asked the question :D
You can probably preserve it using some form of resin, and I know that @nature.art is someone on Steemit that creates jewellery out of flowers. But I think one of the wonderful things about the art that I choose to do is that like a bunch of flowers it doesn't last forever. This resonates with my personal philosophy that the 'art' is more important than the 'artwork', and so the 'artist' is more valuable to the community than the money that they can earn. I hope this is something that the Steemians can take to heart :)
I appreciate the transitory ephemeral nature of the medium. Like a Tibetan mandala that is wiped clean shortly after it is finished..
I have a similar feeling when I spend a long time with my young son to set up a domino trajectory, only to see it fall down in just a few seconds time soon after it is finished.