Just sell everything and forget about Bitcoin. If you are nervous it means you invested more than what you can afford to lose - that will make you too emotional and you will panic sell as soon as the price crashes (and there will be many crashes on the way up).

With that approach you will lose this game. The way to win this game? Invest what you can afford to lose and hold for the long run. Take some profits on the way, but hold onto the vast majority of your coins through bubbles and crashes. That strategy NEVER failed so far.