Later, dannys reaction to fire is that he knows it is dangerous but has no conditioned fear of it. The amygdala is the part of the brain which fuction for the regulation or control of emotions, memory and survival insticts. Since it was damaged, he would feel anything and would see a sense of urgency to get out of that place.
Varied amounts is a good bet. You have a certain amount to pay for objects and bills also have amounts so is easier.
Durable is also good but money can be regained by the bank or job.
Portable is also good but in other times people paid with gold bars which were quiet heavy.
Limited Supply is not it because you need it. So factories keep on producing.
I think it is restorative. Not 60% sure
