[EDIT] It seems the Bitcoin option is available again.

For all the other 'crypytos' it works just the same. So when you have an Ether wallet you can choose that.

Just checked it, logged in and logged out, and indeed the Bitcoin dropdown choice is missing. This could be due to a maitenance reason. (Have not seen any anouncement on that though.)

Account not mandatory to use all the offered echange possibilities.