Only people who want to perform day trading and are actually capable of making a profit with that strategy should look at the short term fluctuations and concern themselves with such things. Anyone else who considers themselves "investor" should only focus on the long term changes and currently we are in a dip which means even if there is more fluctuations, the current price is a discount as well and anyone who wants to accumulate should do it already (ie. don't just HODL, start buying).
This calls for a lot of experience that many don’t have. It’s obviously one of the ways to benefit the most from market movements but without the skill and knowledge on strategy, one might end up loosing even more.
The difficulty that is associated with this strategy is one of the major reason why people resort to holding,
it’s more reliable and you need no experience to hold, just the willingness to buy some more and a lot of patience. Profit would always be waiting for you at the long run.
Talking about the bold words in your statement. I agree with you that holding is more reliable, but if you want to hold strong without selling when you never wanted to, having knowledge on what is required to hold strong is very important, if not you will likely sell when emergency struck, if you have no emergency funds in place to protect your investment.
I may have the desired or zeal to stick to my holdings, but if I fail to put down emergency funds in place, my Bitcoin holdings will be vulnerable to any emergencies that comes up, so having emergency funds in place to protect your investment is what makes an investor to develop a strong holding hands, not just desire.