What about something like this?

When designing a cover one of the best ways to kick start your creativity so to do your research. Go shopping. You don't have to buy anything - you're shopping for ideas. Check out any of the online bookstores and the financial category. If you need a physical break run down to you local bookstore and do the same. Be sure to review the magazines dedicated to this market too. Remember, you're not looking to copy an idea that's plagiarism. This is research. You're taking an idea from here and one from there and so on to create a new idea - your idea. You might want to take a pad and pencil with you so you can do a little sketch work ;)

You can try with having car, gold coins, bundle of cash and a home in the background and a person in the foreground.