What a smart individual would do is either continue holding in the event that he needn't bother with cash any time soon. Subsequently, there is no an ideal opportunity to hang tight for the landfill on the grounds that at any point in the near future the market will develop.
If you are looking to book your profit it is a wise decision to book them if you think that the market could go down. Assuming that the investment you make are extra funds you should book profit once in a while rather than holding for the infinite long term and for that you need to study the market trends carefully and sell everything once the trend reverses and wait for the market to settle down to enter once again at the bottom.
Some people do really have this kind of infinite long term goals which you had mentioned without even realizing or trying to calculate on how much they would able to make
if they would be actively selling and buying out coins and of course only to those which does have potential.Waiting for some dump might neither happen or not on a specific
period which simply means that you might really be ending up on holding for too long and misses out lots of good opportunities to make entries instead.
I cant blame them though because there are ally people who do love to play on the safer side.