When Bitcoin will be universally accepted accepted by Government, of course it will be taxed accordingly. Do you think it will still be as in demand as it is right now, that makes its price higher and higher everyday.
Does the bitcoin community is ready for this?
As long as the tax won't be that big, that will still make its users profitable from Bitcoin. Or maybe, even if it will be taxed, it will still be indemand because of its expensive value. But ofcourse, it won't be possible since Bitcoin is an open source system, decentralized and has no physical value. Government can only make it legal or nor but won't be able to tax it, in my opinion.
It is already being taxed in many countries. For instance take USA. In USA, Bitcoin is considered as property and is liable to tax on capital gain. So does some more countries where Bitcoin is legalized. Meanwhile Japan has recently ended any kind of tax on Bitcoin. Indeed a welcoming move by the government.