That is exactly how it is suppose to be, holding for a long period of time before having a thought of selling but it appears that some people have made up their mind to buy and sell whenever there is a little profit and hoping to buy back when the price drop although it may look like a strategy for them but trust me it is not the best approach to Bitcoin investment and most of these people don't use what they can afford to let go that is why when they buy at a certain price they will have a target where they want the price to reach before they will sell and whenever this doesn't go as planned and they used what they can not afford to let, they will sell even in loss and this means that you are going backward instead of forward.
I think there will be a lot of risks that will occur if they do it, meaning selling and buying again. If the price continues to rise and they run out of patience then it will harm them for the selling action they took. In addition, paying fees for re-execution and the opportunity for such an approach will be difficult for them to be able to hold on longer.
Mixing strategies certainly makes investment steps wrong. But I don't know how they deal with it, of course long-term investment can be done if they have no desire for short-term profits. Regardless of how they invest, of course the best strategy is to hold on.