On an idealistic level (perfect world scenario – one may say in the pure realm of ideals even) — I might agree that these shared fictions are illusions.
But for me I draw a distinction between illusion and impactful fictions. People have been murdered over a lie or an fiction, but someone is dead, which is not an illusion.
If you say “money is a big lie we all participate in”, you’ll likely get agreement from a lot of people.
BITCOIN, the shared data structure that eats up energy on computers around the planet, affords value to the users and is now something will soon pay taxes on: death and taxes being two of the oldest shared notions in history.