There are risks, and it's only a matter of time before someone serves jailtime for a bitcoin related crime.
There's already people serving time for USD-related crimes.
I have two questions:
1) Since BTC is decentralized and apparently subject to no law or taxation, how do you propose bringing a bitcoin thief to "justice" and under whose law?
2) If bitcoin miners and traders are not paying any taxes on their bitcoin related activity, why are they entitled to the protection of whatever society they're evading taxation from?