Answer:
antisocial personality disorder.
Explanation:
Antisocial personality disorder may be defined as a mental condition where a person have a long term pattern of exploiting or manipulating and violating the rights of other people without any regret for committing the fraud. This behavior of persons may cause serious problems in the relationships or at work and is often termed as a con or criminal.
In the context, Ben is making a false statement to the people of extracting gold from mines in the Rockies and thus showing that he is expecting a revenue of 100 million dollar each month. For this, he is asking the people to buy the stocks which cost $5 each. Ben is con artist and is a fooling the people and is trying to make money by fraud.
Thus Ben meets the criteria of antisocial personality disorder.