The FBI says America has a “pig butchering” problem. And it’s costing victims millions of dollars.

“We’re not talking about what’s going on at farms,” said Frank Fisher, public affairs specialist at the bureau’s Albuquerque division. “We’re talking about a cryptocurrency investment scam that is sweeping the country.”

The term pig butchering refers to an unsuspecting victim — the “pig” — being tricked by scammers into forking over money for a promised high rate of return.

Scammers “fatten up the pig by getting the victim to think that they’re investing in something and get them to move money into cryptocurrency,” says Santa Clara County, California, district attorney Jeff Rosen, whose office manages a multi-agency task force combating technology-related crimes.

Once criminals “fatten up” their victims’ digital wallets, they steal the money, Rosen says