Exactly, it's possible that trading can be the main source of income. But for that enough knowledge and skills are very important. Most people trade like gambling. They are unwilling to learn .
Yeah. It's painful to lose money. Most people can not deal with it. As a result they take revenge trade to recover the loss quickly. To deal with loss one must follow strict guidelines. Discipline is the key.
Yes you are absolutely right. Learning is a continuous process. It has no ending. A trader should always adapts new abilities to cope with the changing market. Otherwise it's not possible to make profit on regular basis.