Nekozushi: Botchan! Origin of outfit?

Hi! I was recently gifted an adorable figurine keyring: Botchan, of the Nekozushi series.

Botchan has a cape made of paper money, a brimmed flat-top hat, and a bowtie/scarf tied in a bow around its neck.

I love it, and I'm curious about the potential "story" behind the outfit. I've only seen someone online refer to it as a "money cat," but beyond a fun pairing of cats and money I was unsure.

Thanks in advance!