As an old timer, that hold mentality no matter what cost me a lot of would be profit earlier this year. I had just never seen such massive growth, new situation, yet I was with the "hold no matter what mentality." I do agree to buy the dip, but the overall tone of hold, hold, hold can blind you. I say continue holding, but also take out some as you need.
We all got fooled by the market, no one saw it coming, I have since modified my strategy to hold but sell off some portion when I see significant profit, and never ever a position or exit one all at once, flow with the market sentiments generally