We need around 8 hours for sleep.
All the rest is free time which we use for work - 10 hours on average or if we are still students for study. During 6 hours we can do whatever we want. Maybe part of this time we should use for learning instead of watching different TV shows.
Learning trading Forex is quite an useful choice. Maybe on a long run it will become our new way of income. More free time will be just side effect.