If the government will do its role to collect more taxes in the treasury and its effort will catch hackers and scammers online then it will be okay with me. Paying a small tax that will be added to the miners fee is much more better compared to losing all your bitcoins to scammers and hackers. But if taxes will be placed I do hope it will be only in small percentage since miners fee is already big.

But if the government will look for other ways I will suggest that the taxation will be placed during the conversion of bitcoin to fiat currency and not to all bitcoin transactions online.