I am not sure the topic is money. If it was people should keep themselves far from not only forex but futures, stocks all kind of markets because we know that majority is losing money, even who seems to making money soon or later they became loser it is just matter of time. If it wasn't simply spread betting wasn't exist too. When you look from this window there is so limited people can make money consistently in markets. So topic can not be money.
What could be?
For me it is a game, very challenging game and I have passion on this game. It is against human natural and this make the game more harder I love that challenge.I am looking money part as point in the game but it is not necessary because there are some people who even do not intent to play this game but they are making money, more than most of traders.
Many years I saw people who find what they are looking in the markets, a few sample;
Gambling, most of them even do not notice they have addiction, if they play in casino it will be clearly gambling but trading is a kind of hiding place...
Some people needs to be right all the time and they use market for this. Even when they are wrong, they push themselves to be right. You can hear them 'I predict that it will be worse than 1930 crises but how could I know FED print money and save the markets. -Than a few joke about QEs or FED' (he close his error there and continue to new predictions to be right but never wrong)
Some people need to be look cool and they use markets for that. They think that when they talk about DJIA they are look like super. As long as they believe they get what they want.
Some people needs to trick other people. For them money has to come from others because they needs to be foxy and they sell every kind of BS to others, for example signal providers, big twitter account, fx brokers.
Ed Seykota was right 'everybody gets what they want.'