If the market is bullish, it's easy.
Of course, when the market is bullish, everyone is happy, no pressure whatsoever, we can simply sleep at night. There are times when when I wake up and suddenly see a massive spike in day.
Not selling might be hard if plenty of headlines are thrown into Bitcoin. Great job to stay at the top. When things are boring, making intelligent judgments is how to generate a huge profit for bitcoin.
"Invest what you can afford" - if you have this strategy then you don't have to worry, maybe except time, as you wanted to move fast forward and see how our investments grow. Lessons in life as well: making good judgement and decision are the hardest part.