Is profit from selling virtual currencies (coins) in the game "FIFA" considered unlawful (haram) if the game's terms and conditions prohibit the sale of these currencies, and these terms were obligatorily approved in order to play?

If the game adheres to the Islamic legal guidelines, then the terms and conditions of the owning company must be observed. It is not permissible to sell "the quiz" if the company has stipulated against it, because the paid compensation is for playing the game, and covenants and conditions must be fulfilled.