thelightedghost
if the mc takes advantage of his power well, he can have a lot of money in a short time, for example, he starts by lying that he sells personalized pug weapons for fans, with his licenses to manufacture these, or he sells them on the black market, etc, or become a mercenary. there are endless possibilities, and the world would call him the real tony stark or removes diamonds or some new substance lying that he discovered it and becomes a millionaire at once