KEY POINTS
  • Secretary of the Commonwealth of Massachusetts William Galvin says bitcoin "doesn't pass the smell test."
  • "There is no product here. This is entirely speculation. That's already been proven by the high gyrations of the value. It's also subject to manipulation, because no one can explain it no one can control it," Galvin says on CNBC's "Fast Money."
  • On Dec. 13, Galvin issued what is likely the first investor advisory on bitcoin from a state.

Massachusetts' top securities regulator said his office is qualified to issue a warning on bitcoin because the digital currency is "entirely speculation."

"It doesn't pass the smell test," William Galvin, secretary of the Commonwealth of Massachusetts, said Wednesday on CNBC "Fast Money."