crypto emotional control

It feels good today with BTC at a ATH of $3650 . To keep my emotions in check I am always prepared for BTC to go to zero, as it continues to survive and grow i find myself thinking further into the future about the possibilities for the world of crytos . When BTC is down hard I think "damn! I should have sold when is was at the ATH" then i clam down and stretch my thinking out and shift into long-term investment mode. Overall I think its more stressful for me to resist the urges to sell or trade during the highs than it is for me to just stay put when cryptos are down.

      Anyone have any tips for holding strategies