Yes, descipline is one of the basic characteristic of a trader or investor so perhaps setting targets and taking partial profits at those target points is the best strategy during a bull run because we never know how long it will continue so we need to get something out especially for those who have not cashed out anything since 2017-18.
Those who still have assets from 2017 - 2018, now they are very rich, because almost all coins and tokens have managed to reach ATH at the beginning of this month, so their profits are already very large, almost 3 times more than before.