Understand the difference between buying the dip and chasing your losses.

This is a very grey area and prone to put people in positions they later regret.

Buying low is great for obvious reasons especially if you're trying to DCA down after buying high but be careful you don't fall into a trap of thinking that everything that has crashed will come back up and especially up to where it was previously.

This is not fud but just common sense for people who may get influenced by the hundreds of "oo look at me, I'm so cool I'm buying the dip posts".