You  are insane if you think that you could manage all of them by yourself. If you are a developer, either focus on developing or be a manager by yourself. Yes you could do tokens and casinos and trading platforms, but all of those requires focus to have the best outcome. If all of those would be connected with each other, maybe focus on a little field such as have a token that could be used on a small casino (offers little games) and is tradable as well in your trading platform. Don't make a huge step instantly, take a little babystep towards all of those fields and focus on small progress one at a time.