Lets look to history for a comparison.
When Europe discovered for themselves the Western continents the in a sense found a parallel universe. The question would be did these hunter gathers use money? Sure did> Native American Money - From Gold Dust to Wampum
What about parallel species, animals? The currency of animals is being able to keep up with the herd, the pride, the pack, etc and to contribute to the survival of the family unit.
What about love? The need to be loved by others. This is purchased by giving love to others in exchange for the expectation of being loved by others. Is that what God is using for currency in a sense? God is occupying a higher dimension, correct?