How are ideas like currency?
They can be traded.
They can be given.
They can be stolen.
All ideas have different values (like different bills $1, $5, $10, $20, etc.)
You can make more.
Not everyone has the same desire for them. (Some people are not interested in money, some are consumed with getting it)
They are not always accepted. (Ever have your card declined?)
They do not always work in different parts of the world. (Not all ideas work in all parts of the world)
They can be saved.
They can be lost.
What are other forms of “currency” besides ideas?