Now, of course, there is no sense to sell bitcoin as the price not the best and is sense to leave sale till the best times. It is interesting to me about the author - whether he has sold the coins at peak of the price? 
The price of bitcoin now is still low so i dont believe that it is the best time to sell our bitcoin, and i know that the value of bitcoin can pump more this year so we just need to wait and i am sure that when we hold our bitcoin until december we can be very profitable.