Well, How can it be known by the Government if we do business Bitcoin (trading),
while we know that Bitcoin is decentralization system, it's mean that we ourselves control
the bitcoin, not the Government. So how could the Government set a tax for trading Bitcoin?
We cannot control Bitcoin. The decentralized nature make it so. We only control the portion of Bitcoin that we have access and control of its private key. The decentralized itself forbid us to control the whole of Bitcoin.
With regards to offline business, if we are to invest our Bitcoin, we need to convert it to fiat currency then buy the necessary items or materials for such business. Payment for our staff needs fiat currency unless this staff is willing to accept Bitcoin. Anyway, a food business is one of a better to choices to invest in. People need it everyday and it is consumable.