This is absolutely true. It is both important:
(1) be be patient to make the most of an existing bitcoin position that is in profit, and not get disturbed by short term swings.
(2) But also to use short term swings if people can be more "on the ball" and more active traders. With that, you can outperform buy and hold.
Patience is needed for long term investment, if a good earning is required. At the same short swings happens often, realizing the right swing and selling high helps buy more by the next swing with the profit earned on selling. Importantly try to use the swings effectively, because none is sure when the peak price will be reached. On long term if the expected price is not reached then no use on waiting with patience.