You did a nice job with the lighting. Would only suggest a crop that takes off the empty side on the left. Would really put focus on the details and cool effects of the money dropping into the water.
Not bad... and the coin on the right has some lovely smooth lines (must have been dropped from some hight or thrown pretty hard). If it was me I would have cropped tighter to show more details of the coins and removed the distracting glare from the left of the photo.