I would ask a friend to borrow me some money, and then I would trade them, make the money I want and then give the money back to my friend

Nice. If you would be desperate for money you would risk being even more desperate. I always thought to myself that trading is done by people who can afford the risk. Being desperate doesn't sound as being affordable to risk.
/Sarcasm mode on/ I guess I was wrong on that one and some people have more than one life to risk. /sarcasm mode off/
Maybe im just some weak guy but wow, some people have either balls of steel or are just reckless.