Ironically it's people like you that make the price tank.

If you sell just because you think the price will drop (with no intention to rebuy once it does drop) and not because you absolutely need the money, you are just fueling the drop.

Never invest money you can't affort to put aside for a long amount of time. And only sell when you got profit or when an unexpected event happens and you really need the money.

You only make a gain or loss when you decide to sell. If you bought Bitcoin for $800 and its currently at $227 you didn't make a loss unless you actually sell them. If you wait, price may recover to $1000 and you may actually make profit. Patience is important in trading. Patience makes money, impatience makes you poor.