Hold a contest in several steps:
1. Contest to develop a 3D bitcoin in povray
2. Contest to use the 3D bitcoin in 3D scene which attempts to show a large 50' diameter bitcoin on a statue in a Desert scene.
3. Contest using the winner above to add final touches to the scene, like cars, roads, ...
4. Take the picture out for preliminary bid in BTC only.
5. Go to places like Holloran Springs on the I15, other places across the country. I mention this place because the I15 has a lot of traffic being the corridor between Las Vegas and Los Angeles and some guy has a Ron Paul sign written on his roof. I think .
6. Do a final bid preferably.
7. Install and and laugh.
I think this statue might have a solar panel digital display webcams such that it might show the current price of bitcoin. Also maybe a coke machine that accepts only bitcoin. Height about 200'. Maybe some advertising. Maybe install 10-20 of them.