Hello guys please can we share our views on how to handle one emotions better especially when crypto market goes up and down to avoid selling token cheaply.

The one who does not face this for the first time does not react at all to such problems, knowing that everything changes very quickly. This should also be understood by newcomers so as not to run in panic and sell everything, knocking the market down.
For long time traders and earners, this kind of situation is pretty normal already. They are the ones who have been telling us not to panic and sell when the market is down. Words like that doesn't just came out of their mouth so they can say something, it is probably based from their personal experiences. I have a friend who was a year older than me in this forum and when I had experienced a huge dump for the first time, I told him that I was thinking of selling all of it because the price might continue to go down. He laughed and even made fun of it, we were joking about it but then his last words are "don't sell, the price will go up. Trust me". I doubted that but didn't sell, then 3 months after that, the price started climbing again until it reached the pump price last December 2017. Good thing I did not listen to myself so right now, I am hodling whatever I can hold.