In days like these, my mind tells me to sell and on green pumping days to buy more

My mind is playing tricks with me, I know that it isn't good to sell at a loss, but on continuously red days, I am so tempted to sell.

The opposite is when crypto pumps up several days. In that case I want to buy more.

Am I alone with that?

I do know that accumulating coins cheap and holding until it pumps back is a much better deal, but still...inside of me my mind is telling me to keep checking the charts and maybe to press the 'sell' button.

Seems like the 'Buy high, sell low' club wants me to join, I really dont want to, but the temptation is very big. Any strategy to withstand it or to do better?