Every article I read about Bitcoin has a picture of a metal bitcoin in it. I guess that is to make sure very few people get the point of what bitcoin is.
Suggest what else it could be for a Bitcoin article. Perhaps a visualization of a block-chain? A hash with a lot of zeroes in it? Satoshi walking away from his computer with a wheelbarrow of money?
But then when addressing the negatives, follow that up with an illustration of the current process to obtain Bitcoins.