The following quote from Disco Elysium (one of many notable examples) sounded vaguely familiar in its wording:
Secrets are the currency of human relations.
A quick search unearthed this strikingly similar one:
“Stories are the currency of human relationships.”
— Robert McKee, Story: Substance, Structure, Style, and the Principles of Screenwriting (1997)
And of course, as is fitting for such a game, we have a possible inspiration from Karl Marx with his “Die Logik ist das Geld des Geistes”, or “Logic is the money of the mind.”
So which is it then – secrets, stories, logic? Or disco?