B'rett thought to himself, "Ha, ha... Look at them flee! With my Martian powers, I'll become the most powerful man on Earth!"
"Immediately, the alien newcomer begins his reign of crime..." Recognizing Earth people stored their money in banks, B'rett used "one of my Martian talents" to pass immaterially through a vault wall to help himself. Confronted by armed guards, he chided, "Guns? You think you can stop me with your puny guns? Come to think of it, who needs money? I can take anything I want from you helpless Earthlings!"
“The Unmasking of J'onn J'onzz” by Jack Miller and Joe Certa.