A new investor should not think of selling any of his bitcoin investment during his accumulation phase because if he has the mentality of selling some part of his bitcoin investment during his way up, it will deprive him from reaching his bitcoin target at the right time. It can also become a practice for him and that shows that he has become a trader instead of an investor. This is why he only needs to focus on buy buy buy and not sell sell sell to build up his bitcoin portfolio overtime.
As far as someone has basic knowledge about Bitcoin, it will surely have a target point of selling it. Bitcoin investment, so as for someone who wishes to accumulate some portion of Bitcoin, I believe they will be hard to sell their Bitcoin or some portion of their Bitcoin investment along the way of planning to hold for a very long period of time unless an emergency comes across them, which may lead them to sell some of their Bitcoin investments.
For someone avoid selling your Bitcoin along the way, that is the reason someone also needs to plan for an emergency before investing in Bitcoin. Someone always needs emergency money at the side for any emergency problem that comes up. Without having extra money in your account before investing in Bitcoin, someone is planning to fail in Bitcoin investment because if any problems come up and someone doesn't have any way of getting the money, it will surely temper with Bitcoin investment, which may be possible that it even sells it for less than the price it bought the Bitcoin due to the volatile nature of Bitcoin.