Bitcoin is down more than 60 percent from its high of almost $20,000 in December.
The SEC said many of the platforms should register with the agency as exchanges.
Demand is rising for tokens seeking to dull price swings and increase the use of virtual money.
Matt Hougan has left Inside ETFs to work at cryptocurrency-focused asset manager.
If regulatory concerns aren’t enough to explain its 50% slump from its record high, how about blaming it on the moon?
Wednesday was a wild run of exuberant peaks and white-knuckled declines for Bitcoin.
Producer Christopher Woodrow says the blockchain technology is about to disrupt the movies.
VanEck isn’t giving up on the ETF, though.
Bitcoin jumped in value after plans were announced for bitcoin futures.
Mark Cuban sees a bitcoin bubble, but that hasn't stopped him from diving into a new cryptocurrency fund.