That's not how governments work. Governments prefer to tax things over banning them where possible (excluding activities with significant moral connotations, which are subject to different considerations).
This will be a fun ride until governments start auditing people for not reporting their bitcoin-denominated income.
Governments, especially governments with many international residents and companies, have long since passed foreign currency laws that require taxpayers to convert foreign currency transactions into the local currency for purposes of reporting income. Failure to report your bitcoin-denominated income can mean that the local tax authority (i.e., the IRS) has until the end of time to go after you for back taxes, penalties and interest, and even criminal sanctions (depending on the amount of underreporting).
This will be a fun ride until governments start auditing people for not reporting their bitcoin-denominated income.
Governments, especially governments with many international residents and companies, have long since passed foreign currency laws that require taxpayers to convert foreign currency transactions into the local currency for purposes of reporting income. Failure to report your bitcoin-denominated income can mean that the local tax authority (i.e., the IRS) has until the end of time to go after you for back taxes, penalties and interest, and even criminal sanctions (depending on the amount of underreporting).