If you report your earnings when you sell I don't know if there's an issue. I think the government is going to be losing if they want to go after people before they cash out. Technology will always be miles ahead of bureaucracy.
governments have years to come after you (and in many countries: the rest of your life)
that's the point: even if you're not doing anything shady you don't really know what sort of long term risk you're taking on if you're using something that looks to governments as if it's tailor made for money laundering
At what point do you say enough is enough, and embrace the idea that you should minimize your digital footprint whenever possible?
a technology specifically designed to allow untracable electronic monetary transactions is going to be many orders of magnitude riskier to use