Once again, bitcoin’s price got suckered by vague stories of a regulatory crackdown in China. It dropped 10% in dollar terms Thursday after news spread that the country’s central bank was going to stop banks from providing accounts to digital currency businesses. Trading as low as $512 on Thursday, bitcoin hit its lowest level since November.

It’s tempting for bulls to dismiss this as another unsubstantiated rumor designed to help someone who needs to buy bitcoins cheaply. But there are reasons to be more concerned about this one than, say, last Friday’s similarly price-buffeting rumor that Chinese authorities were getting tough.