Every first timer I ever met lost their entire investment - sometimes in a week, sometimes in a month or two. A few experienced traders seem to be able to make a modest living. What they all have in common is: an initial capital stake of at least $50,000 liquid; very, very conservative trading first 3 - 5 years; study fundamentals very carefully and make no trade based on broker or published recommendations; work very, very hard at independent research and most of all, specialize in one particular currency. A good rule of thumb is that beginners and gamblers lose everything; workers can make a living.
Consistent investor - still alive after 45 years in.