Correct me if I'm wrong anybody, but I believe the IRS wants you to put digital cyrpto currencies under taxable income if you have any type of significant amount of Bitcoin. Still, many people do not do this. It's a light governmental regulation, but nonetheless, it's a regulation.
Who knows, this may happen if the government agree bitcoin as centralized currency and centralized medium of money transaction. But bitcoin organization and miners will not allow this to happen as I know, because they are people get affected because of your mentioned future scheme in tax