Investors invest (at least try) to hodl for years, sometimes as you said - for decades.
Traders are different in that regard - sometimes, you need to adjust your positions on the go..
The easiest job is to be an investor, you just have to wait and Follow up on your investment, not the market speculator, the market speculator must study, operate, Gain experience and do things right, you can't be doing things crazy, everything must be very measured , even with the money you have to operate, if you operate more than necessary and do not have the correct vision of the market at that moment, what you will achieve is to lose money, to be a Market speculator you must try to understand the market well.