YES. It is. High-Dopamine creates Grandiosity, Cockiness/Haughtiness, as well as Self-Oriented Goals such as Obtaining Power, Money, Sex etc.
More Dopamine = more Pleasure.
But OVERLOAD of Dopamine, depending on the Person, either leads to Psychosis - or severe Narcissism with Paranoid/Psychotic-Elements; as in the case with a Malignant Narcissist. Most Malignant Narcissists have "mutations" in their Dopamine D2-Receptors, which makes it so their Dopamine-autoreceptors no-longer-function and thus, their Brain never stops releasing Dopamine and thus "seeking reward & pleasure"...which includes further Gratification & Power-Seeking.
...On the other hand, LOW-DOPAMINE can *CAUSE* Low-Empathy, low Emotions, lack of Guilt/Sadness/Remorse and lack of "General Feelings" as well as Apathy, "life-struggles", Negative Thinking/Procrastination.
Dopamine creates the DESIRE for 'Gaining', to Progress, but Noradrenaline/Adrenaline + Histamine gives the actual ENERGY + RESOLVE to DO-IT. Dopamine just creates the Desire, Desire without Energy = NOTHING.