This is subjective and not particularly true, our minds about Bitcoin investment matter. We have a lot of people who used the DCA approach to buy Bitcoin and have not sold any of their Bitcoin for over 10 years and we've seen some people who used whatever approach you have in mind but sold it at the shortest possible time. This concludes that it is all about the person in question, disposition about Bitcoin varies. The serious Bitcoin buyer will buy it with the intention of long-term HODLing, which I term "Buy And Forget" and the DCA approach can surely help in starting it.
Yep.
If a person understands how Bitcoin behaves through the cycles - he would definitely do it long-term no matter the dip or correction he may face along the line.
Those who responsibly look at their accumulated Bitcoins won't get rid of all of them in one swift go.