It is the psychology but more importantly it is the emotions that get the best of us. This happens in every facet of life and trading is no different. When we lose we want to get out to stop the pain and when we win we want to book our profits. You must get a better mental state if wanting to achieve big things at trading cryptos imo!
Im agree with you. Everytime when i hold some lose token i will sell it fast. Im alway miss the train when it being pump up. So now i will buy and not look at the token for weeks so i get no envolve with emotion to it.
Good luck with that, hopefully, you can get a hold of yourself not looking at the price of the tokens you are holding but that is just wishful thinking. Naturally, you'd be anxious and curious about the state of your coin in the market and sooner or later, you will check its price. It is okay for you to check but you should be emotionally prepared for doing so and not get swayed easily by the graph that you will see upon checking.