"An estimated US$32 trillion (excluding non-monetary valuables such as real estate, art, and jewelry) may be hidden from being taxed, according to news reports."

https://en.wikipedia.org/wiki/Pandora_Papers

http://web.archive.org/web/20211003163640/https://amp.theguardian.com/news/2021/oct/03/pandora-papers-biggest-ever-leak-of-offshore-data-exposes-financial-secrets-of-rich-and-powerful