Important Notice. Best Bitcoin Brokers For Trading with Leverage. On this page you find the best Bitcoin brokers which offer margin trading for potentially higher profits. Below the comparison table you find more details about margin trading on each broker. Margin Trading on BitMex is generally enabled in each account. There is no such thing as ID verification and different verification levels. Note that BitMex only takes BTC deposits, and cashouts again are just possible in BTC. Note that the broker only supports BTC and DASH deposits and withdrawals. SimpleFX is a highly specialized broker which offers a maximum leverage of 6x for BTC trades against fait money. Leverage for Altcoins depend on the coin and are usually lower.