I'm a week into this whole bitcoin thing so be easy on me. I wonder why you would ever sell a BTC ... For example: you buy 100 dollars worth of BTC but the price drops drastically. Why would you sell it when its that low? You KNOW it's going to go up again. You could wait a month (for example), the price will be up again. Or am i totally wrong here?
The power of the person is different, there is a strong belief that bitcoin can rise high, and some easily panic by price reduction so selling at low prices, risk and profit depends on the choice.