When that happened last week, I just held. I had the thought to sell before the predicted rise, and would have increased my BTC had I done so.

Also, this recent predicted dip from 20k to 11k, I considered selling all BTC savings for USD, then buying back -- had I done so, I probably would have increased my coins 25% or so (I almost never hit the peaks, and with laddering you're "guaranteed not to").

I'm still learning myself! :) But last month was an awesome practical application of lessons. :)