Way more valuable than time or money. This is why people(especially buddhists) say to "be present in the moment".
Attention management is crucial in being able to find meaning in today's society. Neil Postman did a good job regarding Huxley's warning to the world.
https://www.goodreads.com/book/show/74034.Amusing_Ourselves_...
There's even some unique ideas like Zombies in Western Culture which talk about our lack of meaning and insatiability of consuming others "brains":
https://www.goodreads.com/book/show/35523766-zombies-in-west...