If the market is bullish, it's easy.
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.
I think it's really hard for the noobs to stay calm with all those headlines bombarding Bitcoin nowadays, but for the goodies, I believe they can handle it because they already know what it is, and it will eventually come and go and after all that Bitcoin price will rise again and that's how whales accumulate more wealth through hodling.