Of course, if you want to make money by investing, you have to stick to long-term investments, because short-term ones will not give you profit, but will push you towards losses.
I disagree with you that short term holders don’t make money, the only thing which I will say is that it’s kind of risky, and the chances of you making money is less. You might buy bitcoin and if you are lucky, the price might start pumping and you going to take your profits, but things like this don’t often happen, so it’s just better to hold for long term whenever you are planning to invest in bitcoin. If you have short term plans, bitcoin might be down when you will want to sell it, but if you can hold bitcoin for like 10 years, it’s not possible for you tell sell at loss if you will be selling it.