Yes, I believe many people can do forex. However, there will be exception of course. Some people can't even win at a game of blackjack, so those can't do forex cause they will not want to learn and they will know how to reason enough to win money. Yep, there are such people believe it or not or else there will be no casino and no online gambling right. We will all win money so in forex they also depends on those people so they can win money as well. I mean brokers would love it if you keep on opening trades right.