KEY POINTS
  • The FBI says investment fraudsters pose a "significant threat" to LinkedIn.
  • Users around the country tell CNBC they lost small fortunes after connecting with someone on LinkedIn who they believed was giving them sound financial advice.
  • The company acknowledges a recent increase in fraud and says it removed 32 million fake accounts last year.

SAN FRANCISCO — Fraudsters who exploit LinkedIn to lure users into cryptocurrency investment schemes pose a "significant threat" to the platform and consumers, according to Sean Ragan, the FBI's special agent in charge of the San Francisco and Sacramento, California, field offices.

"It's a significant threat," Ragan said in an exclusive interview. "This type of fraudulent activity is significant, and there are many potential victims, and there are many past and current victims."