Evolve.Markets has BitCoin denominated accounts.
I'm pleased to report smooth withdrawals of BTC (BIT).
I believe Evolve absorbs the transaction fee as well.
No problems with a payment processor !
EDIT Of course you are dealing with a somewhat volatile asset
in BTC which has recently risen and apparently stabilized at
just over $6000 / BTC as of this time...
EDIT2 I like that Evolve allows you to enable Google Authenticator
on your mobile device as a 2 factor requirement prior to any ability
to withdraw funds. Pretty secure seemingly.