I'm thinking that the impact of crypto-currency and the shadow banking facilitated by the Internet and our advanced mathematical computing abilities is just starting. I'm very far from an expert but it sure does seem like a big damn deal as I sit and speculate. The ability to covertly transmit large amounts of value instantly is a MAJOR contributor to crime and institutional corruption. the Spartans even had a heavy and inconvenient spoiled iron currency for day to day trade in a direct attempt to mitigate this, reserving gold and such for external trade conducted by the royal houses. Now the stage is set in the exact opposite fashion. Folks could be carrying a 50mil bitcoin wallet on a thumbdrive in their pocket nobody the wiser.
I also wonder about the effects crypto-currency is having on the markets, but lack any real technical understanding. What I do know is that the international currency markets were already the least regulated in the world and that barring some sort of global economic pact there's no getting them out of the system as long as the exchanges keep valuing them.
Is this along the lines of discussion you had in mind here?
Cash is much much easier for crime and corruption than Bitcoin. Bitcoin is NOT anonymous by any means, and people using it for illegal goods get caught all the time. The value of Bitcoin to crime is in using it over the internet, like Paypal, but with less need to register.
Add to that the fact that much of the corruption here in the US is from our own government and banks, which can transfer huge mega sums of money anywhere quickly for corrupt, criminal, or other immoral purposes while leaving far less of a trail to investigate and get caught. Entities that not only do so regularly, as a matter of course, but have the authority to print new money in massive economy-damaging amounts and they do THAT regularly.
Bitcoin has all kinds of issues but its reputation as a crime-supporting anonymous internet druglord currency (IE: Silkroad) is overblown and inaccurate.