However, everyone's life situation is different and it can be very difficult for someone to hold on for a year. So if someone thinks that one year is long-term, it is only their personal matter, which cannot be said to be bad at all.
I disagree with you to accept from anyone that one year bitcoin of holding bitcoin and selling is a long-term even if they claim it is. One year is not investing because you will still be a low coiner. That person is a trader and not an investor because he is only after profit and not after building, growing and norturing his bitcoin investment to a certain level in future. A lot of people into bitcoin are traders because they holdi not up to a circle and take profits but they claim to be investors. They're in this forum.
Buying and selling Bitcoin within a year is not ideal for anybody that wants to call themselves a Bitcoin investor, they need to hodl for the long term. Experienced holders will categorize such people as traders because one year alone will be considered trading, it comes with risks because Bitcoin is volatile. You cannot get sufficient returns on investment if you sell on the short term, it is possible to sell at loss if it dip at the point of sale. Smart investors hodl between 4 to 10 years and more by then they're sure that atleast two bull circles have come. Holding for the long term and choosing to sell after ATH is a good investment plan.