About me , i said " no" margin like a killer. You can win one or two times but only alit bit greedy . I will take all your money away. Im already in that situation before
Margin is not that bad though as long as the trader is not greedy. Most times if you are good trader and you still make do with a very reasonable leverage level, you should not get caught up in a very bad trade without at least getting out and losing just few.
However, I have never been a fan of margin trading, considering it is more or less a huge gamble which could make you loses so much, and I would rather trade more like investing in the normal way.