@Jay Hova
I understand your point but I believe you got it wrong.
Central Bank does not have to monitor anything.You can pay in normal currency, you can trade things with people, you can even pay in a non-existing currency if someone is willing to take it as a payment for you.
Also, the same thing goes for bitcoin.
If someone is willing to pay you for something you are selling ( bitcoin ) there is no problems in it and central bank or other institutions do not have to interfere.