On the topic of tax evasion... what if they arrest somebody and find many thousands of bitcoins in their possession, but that somebody claims that they mined them themselves (and the block-chain confirms they weren't transferred)? What if they were all mined when they were basically worthless?
Would you have to pay tax only when you convert them to dollars? I mean US multinationals don't pay income tax on foreign income until they repatriate it...
