id say its actually a fair warning to investors.
the same warning they give to any investment
id say it acknowledges and legitimizes that bitcoin can be used freely by americans
its not negative about bitcoin... just who may abuse it
virtual currencies, such as Bitcoin, have recently become popular and are intended to serve as a type of money.
they may be traded on online exchanges for conventional currencies, including the U.s. dollar, or used to purchase goods or services, usually online.
We are concerned that the rising use of virtual currencies in the global marketplace may entice fraudsters to lure investors into Ponzi and other schemes in which these currencies are used to facilitate fraudulent, or simply fabricated, investments or transactions.
if they were negative about bitcoin they would say to stay away from bitcoin itself, or that its not to be treated like money.. rather than saying just be aware with who you transact with