I'm very concerned about it, in part because our entire system of regulation is based on the assumption that large sums of money are what we need to worry about and that this is where we should focus our regulatory activity. On the Internet, however, sometimes very small amounts of money can be used to have vast impact, and that doesn't even get into the possibility of Bitcoin and other technologies being used to entirely mask where the money is coming from.
So yes, I have deep concerns.