Dominoes indicate falsehood, hypocrisy and that should apply to the people appearing in the dream. Dreaming of winning the domino game indicates vanity, some authority when it comes to problems and enmities, but not in an honest way, which will cause resentment in some and admiration in others, especially in shameless and immoral minds, all of which will somehow manifest in real life.
Dream dictionary: Domino dream meanings
If youre playing it, you should not make investments of any kind.