They don't. That's why they're poor.
B. less than $10 million worth of gold and silver.
The is the same as to why did European societies develop different cultural traditions in different regions.
The answer is that different groups of human beings living in their own regions are going to naturally develop their own traditions, different from other groups, as well as their own languages, etc, because they are only or mostly in contact with people in their own individual groups.
The answer to your question is gold.
Answer: Social Identity Theory
Explanation:
Social identity theory states that our perspective of who we are is affected or influenced by the group to which we belong i.e if we regard our group as the greatest and more influential group then we will also feel that we are the greatest and influential individuals. We may start using words like 'we' 'us' refering to our group including ourselves and this tends to give us a sense of pride and boost our self esteem. Anyone who is not part of our group we refer to as 'them' which brings the terms of in-group and outgroup which the in-group are those who belong to our groups and outgroup are those who doesn't.
This makes us tend to exaggerate our differences to the outgroup and we may start to think we are too great ,too powerful than those who isn't part of 'us'.
Auaruna is doing the same thing exaggerating the power of his in-group die to social identity it gives him personally.
