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?
Do not panic, and do not sell your bitcoin for a low price. If you look at the bitcoin price chart, you can see that price changes, bitcoin may fall and can also increase again. So, just hold bitcoin for a while and you will get a profit in the investment.