Skilled traders can and do make money in this field. Think about it, if it was, everyone trading would already be millionaires. The truth is that even expert traders with years of experience still encounter periodic losses.
Forex is a legitimate endeavor. You can engage in forex trading as a real business and make real profits, but you must treat it as such. Don't look at forex trading as a get-rich-overnight business, no matter what you may read in hyped-up forex trading guides.