"In the field of psychology, the Dunning–Kruger effect is a cognitive bias which people of low ability have illusory superiority and mistakenly assess their cognitive ability as greater than it is. The cognitive bias of illusory superiority comes from the inability of low-ability people to recognize their lack of ability; without the self-awareness of metacognition, low-ability people cannot objectively evaluate their actual competence or incompetence".
This unchallengeable confidence can come from birth and privilege, but you don’t have to inherit your father’s connections, company and cash to believe that you are a genius.
In the world of work, particularly the financial world, the illusion is as likely to come from other forms of luck. The trader who has followed the market up with bovine fidelity can also think he’s a genius for the money he’s made for his bank (and for himself), and there are favourable winds that can catch a career in many fields
These are poison is evident and anyone concerned with the management of risk has a role in identifying these behaviours and a duty to call them out.
You must draw your own conclusions about The Donald.