Holding is very profitable in most cases, but in a case where the currency losses value after a long hold, you may have to sell at a loss or hold longer. I believe that sometimes people day trade to get money for emergency situations and the there also some who day trade foolishly.
Holding can be consider as the passive way of income, where we do not require a lot of experience or hard work, we only need to hold our bitcoin and when the price increases then we should sill it on time.
it doesn't matter if you have other sources of income, but I have to do cutloss if the market conditions don't allow to hold coins that I consider not too profitable in the short term.
a trader always thinks practically with periodic analysis, if not, they will not have the concentration to speculate quickly as the opposite happens to hodler.