A sophisticated, atmospheric digital painting for an audiobook cover. The central image is a solitary, antique, gilded birdcage, slightly ajar, with faint, shimmering gold coins spilling out from within, some falling to the dark, polished floor. The cage should evoke a sense of opulence and entrapment. The background is a deep, velvety emerald green, subtly textured, with soft, diffused light casting long, dramatic shadows from the cage, creating a mood of mystery and hidden wealth. The overall aesthetic should be luxurious, moody, and intriguing, hinting at themes of wealth and its consequences. Square 1024x1024 format. NO text, NO letters, NO words, NO title, NO author name — only visual artwork.