Narcissistic are made, not born.
If you investigate narcissistic behavior, these people were almost always denied love in their formative years.
Because of this, envy of others is often their most predominant characteristic. They simply must leech off others wellbeing of empaths in their social orbit.
Now, if you self-identify as an empath, you simply cannot afford not to spot the unnatural envy and unhappiness of someone in your social circle at your successes. Beware, that’s a narcissist.