because they don't know how to demand taxes from this, and still fear for the economy of the country
It is hard to have a tax on bitcoin specially when they do not know the system of bitcoin in terms of transactions, it is quite hard to tax bitcoin because of its price and it stock movement in the market. So technically government should have the capability to learn the system of bitcoin so they could help people on earning with the used of bitcoin and have a better way of transaction with faster and reliable way of transaction in the future.