Why selling everything i dont think that would be very great for the people who having bitcoins because why selling all of them if it dont need to spent all of it. Never sell everything just invest everything.
The idea of selling will only happen when you see a great price and you are guaranteed already to earn a profit, but if you are not on that situation yet you should keep your bitcoins and wait for the right timing before you sell, do not be greedy and follow always according to plan for you not to miss the opportunity.