I am a long term HODLer and believer in BTC.

I have been adding to my position since 2013. and sold 0 BTC over time.
Obviously I am happy with the development but the worm of greed is always digging in the back of my mind. Could I increase BTC if I sold BTC for some fiat or Tether before correction and add more BTC when the correction ends.

I had no problem holding BTC when it crashed from 900$ to 200$ but I would have mental issues if I converted 1 BTC to 2400$ and had to buy again at 2500$ thus diminishing my BTC stash.

Are there any long term HODLers who are succesful at employing this tactic of buying corrections? If so I would like to hear your strategy. Thanks.