So easy to say but very hard to follow Especially for long term investors. It's never a pleasant thing to invest in a coin and then watch your investment go low. I have come to realize that in any situation of the market, patience is much needed and also your choice of coins for investment and time of investment also matters. A simple way out is to plan your funds, dont fomo, buy at more dip, take profit at intervals.
for long-term investment it is indeed more difficult, in addition to requiring strong analysis it is also necessary to select the right coin. because the asset stakes are very large in the long term. in addition, investors must be strong in carrying out long-term holding. it is like being patient when there is a storm and having to be strong under any circumstances until the point in time is found.
I believe it could be "made" simpler for long term investors, it all depends on what are your goals are but if you are smart enough you could find a way to make it simpler to hold. For example if you invested into bitcoin, and you keep investing into bitcoin once per month when you get your salary, that means you have a good plan laid out already, that will make things easier for you in the entry side and you should do that for 10-20 years without any stop, just put some money into bitcoin every month for 20 years.
Second part is the hardest part, its not to sell when you see it go super high or crash very low, for that to happen I suggest not checking the price at all, obviously when you are buying once a month you will see the price, but ignore that and for the rest of the month, and your life, do not check the prices or care, just ignore it completely, focus on the fact that you will sell 20 years later and not a single second early. That will really help you.