what is the worest mistake for beginners

In this post i want everyone write what is the worst mistake that any trader can do and any new trader in forex market should avoid it,
I hope everyone share and tall his or her opinion.

new logo ki forex me sab se bari jo muje mistake nazar aati he woh yhi hoti he ke woh learn nahi karte or greed hi karte he or earn karna ka hi soch rahe hote hen or yhi unko loss ki traf le kar jata he is lie kamyabi ke lie in sab ko chorna ho ga kuch time ke lie or learn karna ho ga

gee bhai hmein apne trading mein mistakes nhe krne hein aur hmein apne trading mein experience ho aur hmein apne trading mein experience ho aur apne trading mein acha kam kia krein aur apne trading mein mistakes na krein phr hmein apne trading profit dete he