what exchange for btc margin trading?

[Antonioz]

hello, I normally trade on poloniex but I was looking for an exchange which offers margin trading on bitcoin (poloniex offers it only on some altcoins), I was thinking on bitfinex but I am now reading it's having problems with withdrawals etc... so I wouldn't want to risk it, any other suggestion? thanks!

[moynul2050]

I never do margin trading, so far I only know from some friends and he did it in poloniex.
 I agree security should be a priority, Bittrex seems very safe. Please try

[Antonioz]

I wasn't aware bittrex offers margin trading? I didn't see the option on it