I heard from a trader once - leverage is neither good or bad...

I heard from a trader once - leverage is neither good or bad, it's just a tool to wield. In the hands of a skilled trader, it's useful but vice versa, it may self-cut if one doesn't know how to use it. I think if one want to use leverage, just have to be careful and prepare comtingencies for the worst case scenario if the market suddenly tanks and you get hit with a margin call, can one cover it so one doesn't end up with all your positions liquidated?