Yeah, of course. Why not? But, it is expected that after you buy you will still see your Bitcoin go down in price. That is not something that is happening once in a blue moon. That is always happening. That is expected because Bitcoin is always rising and then falling in price. When was the time Bitcoin stopped being such? But then you should not make a mountain out of a mole hill. You should not react when your Bitcoin is falling down. It will always recover after such a temporary period.