Lets take the following example. You buy BTC at 6k and it goes up to 8K. Do you sell 100% of it or do you sell 75% and keep 25% in BTC.
What are your opinions / tactics?
It's depends on the type of person. Are you type the person who short hodl (a day trader) or long hodl??
If you ask me, I will sell it 100% for short trade. And I will buy it again at the lowest point after I reanalyzed the chart and news.
But, sometimes I do long hodl if the project looks promising to grow up. In this situation, I will sell 50% when it's up and 50% for long hodl.
Before I do long hodl, usually I will do research in all aspects of the project.