Trading it´s not a bad idea if you have what it takes, or just built the disruptive app!
Someone can easily earn a living with trading in bitcoin, if he has enough experience.
Trading can be risky for those who have no knowledge or experience about it, but it can be very much profitable for someone with much knowledge and experience in trading.
People even can earn 0.1-0.5 btc in a week with good trading skills.