This is My Entry. I took the definition of Steem Bounty: "money you can send to a post which will then be given to the top level comments as an incentive when the post is being paid out" and try to transform those words into a symbol.

So there is an emphasis on "top level". I interpreted that as a golden comment. Thus, the golden/yellow line in the message box, and reward that comment, so I added a Token to the comment.

Although looking at it now, the arrow thing should be pointing up since its a comment not a message. If you guys like this, I could totally do some tweeks on it.

Create, Improve, Create ...!