Trading using leverage at the beginning of a trading career can be disastrous because one, a trader might not have the experience required to enter and exit a position properly and when he/she trades using leverage, then it can amplify the losses. Secondly, beginners don’t usually risk too much, so if they use leverage and blow up their accounts, they might not have the courage to return to trading ever again. Trading with leverage only makes sense once traders have enough experience to make profitable trades or at least minimize the losses.