Some people are selling this time. And I think that is not that bad. Because the value is not that low on this moment.
And you never know what can happen, because we are not for sure that after halving that the price will rise.
Exactly, if the current price is higher then what you bought in the past then I think you should sell a part of it and earn profits as we are not sure what would be the value of bitcoins at the time of halving.