What is the purpose of money?

I had a dream that the purpose of money is:

we are on the path of moving from a 3D reality into a 5D one. Money is an illusion, it is one of the 4D ways in which we are learning to instantly manifest.

My dream told me another of the difference in 3d and 5d is more simply understood as being able to turn challenges, into opportunities. Money is useful in this way. Its a challenge to get, and it becomes our worth and also an unlimited potential opportunity.

If you dont want to do something; money can make it happen. Doordash is a good example... imagine you are hungry and the thought causes that food to arrive at the door, hot and ready 30 minutes later...

What do you think the purpose of money is?
Or, do you ever have crazy dreams like this?
What is the purpose of money?
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