Bitcoin is like a gold that time past by the value of it becomes valuable but the difference is the phase of the price in gold its took time but in bitcoin tooks just a cycle. Every large company, organization or even a small investor has an impact with the total market movement because theres a demand of it reason it has a fast phase movement of the price now the larger price of buy and sell the higher it impact on the total supply accumulated.
- If I buy Bitcoin, will it be more profitable to hold it for a long
time or for a short time?
It depends on your risk management or appetite, not all people are succesfuly trades their bitcoin and hold for a long time because of too much happenings other sells due to panic, others satisfied to their profit reason to sell and other keep holding for a really long term. Now if your goal is to flip of course make a short term if your goal is took how many cycles you can make a DCA as you can.