When the 'weak hands' sell they often buy back at a cheaper rate with more coins.
This is most definitely true. Perhaps not for all of them but this 'weak hand' does it often.
Until they get caught in a bear trap... Then they are empty hands.
If you are not a bear, the 'trap' is irrelevant. Some make a lot of 'weak' plays by high volume standards. Just know that those setting the 'bear traps' are often accounted for by smaller and smarter game. The small guys don't have the power of the bluff, but information is king.