After working for too many years I became quite wealthy through the last crypto/memestock/etc. bubbles and am no living off my fortune. I realised German seems to be one of the very few languages that has a precise word for this, "Privatier". Spanish has "rentista", but that word refers to living off a pension and the additional meaning of living off a fortune was just added on, so it's pretty inaccurate. English - as always - just has a few rather stupid formulations I've never heard:
independent gentleman
man of independent means
man of private means
How is this possible? There are more people living off their fortunes than ever before in the history of mankind, what do they all put in the "occupation" field on forms?