As kind and generous as you can be you can't change who others are in the end. Also I wouldn't be surprised if his money is in the hands of Jo'on now.
Pasting from wikipedia
"It is also said that hospitality of the inhabited people may turn binbōgami into fukunokami. Ihara Saikaku's Nippon Eidaigura (日本永代蔵) includes the story (Inoru shirushi no kami no oshiki 祈る印の神の折敷 lit. oshiki as a praying sign) which tells
About the man who deified a binbōgami. At the night of Jinjitsu (January 7 in the former Japanese calendar), a binbōgami appeared at the man's bedside and thanked him, "I had a prepared dinner on a tray for the first time," and made the man a millionaire in return. And it is also said that a poor hatamoto (middle-class bushi), who thought binbōgami had brought him security as well as poverty, put sake and rice out to pray to binbōgami for a little bit of luck. And then, he received a little bit of luck. This binbōgami is now enshrined beside Kitano Shrine, in Bunkyō ward, Tokyo. If you pray at the small shrine to welcome binbōgami temporarily, and send him away 21 days later, it is said, you can avoid binbōgami thereafter."
