don't sell it just wait until it reach $5000 then decide if you want to sell it or not but if you want to use safe way,sell it when it reach $4700 So you don't loss the money.
Yes, the price will increase and reach new price margin. No need to think about the issues, it's good to have patience and make the best out of it. At present keep holding at least till it crosses $5000, so that you'll profited and no need of thinking about losing. Here it's all about trust, believe in it. Profiting happens now or later.
I expect good things will happen in October, everyone would expect Bitcoin price will return to $ 4600, I remember the feeling when sell Bitcoin price $ 4600. If it hits the price $5000 as you say it is wonderful thing, I like your thinking.