When investing in bitcoin, no one guarantees profit and safety of funds. You can both earn 100% and lose everything.
This is risk rooming around your head. It is just like a sword hanging over your head that can fall anytime and cut your head. In trading or investing in bitcoins, there are profits and losses that can be your fate, according to your performance and concern. Nobody can assure that he will be getting profits every time when indulged in bitcoins trading or investing, you must be ready for both.