stealth wealth

stealth wealth (uncountable)

1. (informal) Monetary wealth that its owner keeps secret or discreet, rather than flaunting it; quiet luxury.
   • 2023 March 30, Carola Long, “Gwyneth Paltrow, ‘stealth wealth’ star of the courtroom catwalk”, in Financial Times‎:

     So-called “quiet luxury” — understated but ultra-luxurious clothes favoured by the super-rich — is back in vogue, with an emphasis on stealth-wealth brands such as The Row, Loro Piana, Max Mara and Hermès.