Does the jurisprudential maxim, "That which is built upon falsehood is itself false," apply to my money and professional life, and what is the ruling on money earned from work based on a certificate or means obtained through deception?

The questioner's delusions and baseless fantasies have no reality and do not render his earnings unlawful, because the suspicion of unlawfulness mentioned pertains to the liability of the direct perpetrator of the unlawful act, not to the purchased item itself. The cure for these delusions is to ignore them and seek refuge with Allah from Satan.