In short, despite what many seem to think ?? -> Anything they do / will do / or try to do is simply a hack. The problem they have isn't going away - they'll eventually need increasingly draconian legislation to monitor bitcoin transactions.
It will be (almost entirely) up to trust in the long run.
The problem that techies don't seem to realize...is that the system has always been about trust from the very beginning.
It was only within the past decade and a half that the IRS even acquired the ability to to spot discrepancies in returns based on filings from different taxpayers (due to the increase in e-filed return. Before that, enforcement relied almost entirely on random audits and tip-based investigations.
> “The danger is the creation of an electronic black market, similar to the cash economy,”
But how can they avoid it if Bitcoin does work like cash in many aspects and they have no control over it?