you get bitcoins in, pay with bitcoins out, (mind you effectively untraceable); take them out of the country as well.
The thing will out generate money, until the government recognizes bitcoins as an asset and requires moving those assets to be centralized, tracked, you can't do anything about. So prior taxation, it has to be regulated.
No not really, miners pay electricity with cash, they are constantly selling at least the cost amount of whatever they mine. Also big mining facillities are really easily traceable.
The thing will out generate money, until the government recognizes bitcoins as an asset and requires moving those assets to be centralized, tracked, you can't do anything about. So prior taxation, it has to be regulated.