Law is pretty much interpretation. The link above pertains to a business. Earlier I read this, which was interesting. http://fincen.gov/statutes_regs/guidance/html/FIN-2013-G001.html
The pertinent part
Definitions of User, Exchanger, and Administrator
This guidance refers to the participants in generic virtual currency arrangements, using the terms "user," "exchanger," and "administrator." A user is a person that obtains virtual currency to purchase goods or services. An exchanger is a person engaged as a business in the exchange of virtual currency for real currency, funds, or other virtual currency. An administrator is a person engaged as a business in issuing (putting into circulation) a virtual currency, and who has the authority to redeem (to withdraw from circulation) such virtual currency.
Users of Virtual Currency
A user who obtains convertible virtual currency and uses it to purchase real or virtual goods or services is not an MSB under FinCEN's regulations. Such activity, in and of itself, does not fit within the definition of "money transmission services" and therefore is not subject to FinCEN's registration, reporting, and recordkeeping regulations for MSBs.
So, as the first responder said, it depends what you are doing.