As much as that advice would be well to heed, express, few have the ability to do so, for it would be contradictive to human nature (admitting one's mistake, for having sold).
I know the feeling myself. Buying back is hard to do, at a higher price. It's the old 'missed the boat' dilemma, not realizing that paying a few pennies more is hardly really having missed the boat.
It would be worse to NOT pay a few pennies more, than to REALLY miss this boat!
But then of course, those who sold were not meant to own in the first place, for those who truly have insight, would have taken the advice to accumulate or average down, but never sell.
The tortoise always wins the race. When the hare is snoozing, is when the tortoise gains the greatest ground.
6k more at .423!!! You snooze, you lose!!! LOL