The Federal Bureau of Investigations is asking victims of a failed cryptocurrency Ponzi-scheme to come forward. 

According to the FBI, they're looking for investors who may have used Bitconnect Coin, a cryptocurrency investment platform that promised investors a return based on their investment. 

The FBI says that due to the nature of cryptocurrency it is difficult to know the true identity of investors in Bitconnect, as they were assigned alphanumeric identities. 

However, the victims reportedly lost between $2.5 billion and $3.5 billion worldwide. 

So far, one victim has been identified in the investigation- a Northern Ohio resident. 

The FBI says that for a majority of BCC’s existence, the only place to purchase, trade, or sell the cryptocurrency was through the proprietary exchange hosted by Bitconnect.

By mid-December 2017, BCC boasted a market cap of over $2.5 billion. 

Bitconnect allegedly guaranteed investors up to a 10 percent total return per month on their investment, following a tiered-investment system based on the sum of an investor’s initial deposit.

The entire market for BCC crashed in late January 2018, after two U.S. state-level securities regulators issued public letters warning investors of the Ponzi-type nature of Bitconnect. 

This reportedly led to Bitconnect completely shutting down its exchange for BCC, eliminating the market for the cryptocurrency and stranding investors with near-worthless cryptocurrency.

Anyone who may have invested in Bitconnect, is asked to please complete a brief questionnaire. 

The FBI says responses are voluntary and would be useful in the federal assessment of this matter and to identify you as a BCC investor and/or potential victim. Based on the responses provided, you may be contacted by the FBI and asked to provide additional information.