If a person makes long-term investments, such as buying continuously based on his stable income, then his chances of profiting from his investment are much higher. If a person sets his goals before investing, such as how many Bitcoins he will accumulate in his portfolio, how long he will hold his holdings for, if he plans to invest in all these aspects and holds them for the long term, then he can benefit from his investment.
You have a good point, it is about target and goal setting regarding long time investment like hodling bitcoin. If you don't have such target it will also be like you are trading because greed will not allow you to cash out when you are suppose to on your suppose target and at the time you will realize it, it may start dropping where you will either cash out in losses or you decide to leave it which could dump more.
Long time investment in bitcoin is good if done at the right time but if you are a late comer, you may be buying night market when others have gone.