That is the problem of jumping on a discussion without even looking at the caption. We shouldn't be discussing selling at all but how to build our portfolios in this time of lower prices and hold for long.
Following the discussion in this topic have actually shown that many people entered into Bitcoin with wrong mindset and poor expectations. Some entered because they heard one can make so much profit within a short time, so they expect the profits like now, the reason they panic when the profit is not coming as expected.
Assuming we can tell people that Bitcoin is a long term investment before they even got started, maybe some of these agitations would seize to exist as people will join Bitcoin with the proper mindset.
Also there are people who start selling whenever they see small profit and this way they miss bigger piece of the cake. It must be our first and foremost duty as a bitcoiner to learn ways about how to build our portfolio.
There is no small duration investment that can make you rich in small duration. One has to invest his time and effort along with money to earn profit. In case of Bitcoin the profit is guaranteed if you invest for long term. There are people who do day trading and earn profit occasionally but in the long term they are deemed to lose money.