If you believe BitCoin and other similar alternative stores of wealth cannot be tracked or made illegal by the governments you are incorrect.
Who believes that?
The Bitcoin ledger is public by design. Only a completely uninformed boob would think it "cannot be tracked". I posted transactions from the ledger above.
As far as banning it, so what? China has repeatedly banned mining, trading for their fiat, and pretty much every other type of transaction with it, and have not been able to stop it. Chinks did over $200BB in transactions in the year after their last ban went into place.
