I'm curious about America's cardroom. Do they have tables where you play in bitcoin, or do they just allow you to deposit with bitcoin but then you chips get converted to fiat? I've also heard that you need to verify your identity in order to make a withdrawal. I don't really mind the time needed to withdraw, since I was used to that with fiat already, but not knowing what bitcoin rate you will get is quite bad. Can't we just withdraw to a bitcoin address? This way we would have no problem with withdrawals.
At the point of deposit you will get your bitcoins converted into fiat and you will play with fiat, when you want to withdraw the withdrawal will also be in fiat converted to bitcoins at the point of the transfer.
I can't remember if I confirmed my identity on americas card room or not, but I guess that you can ask in chat, anyways it's a regulated poker room, so if you are not okay with revealing your identity, then you better search for another poker room.
You can't know what is going to be the bitcoin rate when you request a withdrawal, but you can save money from that as well( if the bitcoin rate drops soon after you completed your deposit).