Of course even if the government put a tax on bitcoin people will absolutely patronize it, As long as people get can benefit on bitcoin the demand will definitely always high. The question is how can the government detect who are the users of bitcoin and besides bitcoin is not yet legalize but also not yet ban.
This is the issue that is not yet solved until now. Btc community are trying to avoid the government tax but in any other ways, some countries try to find ways just to get taxed from btc. Anyway, still btc is decentralized and I think eventhough government will success about btc to have taxes, still it will not affect the btc community.