Wikipedia
Whuffie
Whuffie is the ephemeral, reputation-based currency of Cory Doctorow's science fiction novel Down and Out in the Magic Kingdom and his short story "Truncat". This book describes a post-scarcity economy: all the necessities (and most of the luxuries) of life are free for the taking. A person's current Whuffie is instantly viewable to anyone, as everybody has a brain implant giving them an interface with the Net.
The term has since seen some adoption as a synonym for social capital, including its use in the title of the Tara Hunt book The Whuffie Factor.
In 2016, Doctorow stated that Whuffie "would make a terrible currency."