Tobaku Mokushiroku Kaiji
When Kaiji first encounters him he taunts Kaiji and Koji that he will be eventually released by his comrades. Kaiji begins to assume that he must have hidden assets on him to force his comrades help him.
Unfortunately for him, Kaiji manages to guess the reason behind his confidence; he had hidden assets on his body despite being naked. With the only item on his body being a bandage on his back.
Kaiji manages to secretly steal his assets by fighting him and hides it in his mouth showing it to his comrades who in turn were forced to also spend money to release Kaiji to obtain them from him.