You should use BTC as a basic unit

What you want are the big player who will make rolls with at least 0.1BTC!
It's easier to make them gamble if they don't SEE how much it is xD
They are using btc for high rolls when you check at the crazy rolls tab you can see the unit is btc.
I agree with maku you guys should have an option to change the unit so it won't be confusing.