Cryptocurrency is the hot new trend in investing, but much is still not understood about this volatile digital payment system that does not rely on banks to verify transactions. This has created a fertile environment for scams, according to a new in-depth investigative study by Better Business Bureau.

One of the more widespread scams they are seeing right now uses a familiar pitch. BBB investigator Don O’Brien says criminals are using cryptocurrency as payment for other scams.

Reports from victims of large financial losses to cryptocurrency-related scams are skyrocketing. Cryptocurrency has some key traits that make it attractive to scammers: It is relatively unregulated and difficult to recoup once lost; it is wildly popular, fueled in part by celebrity endorsements; and it is not well understood by the general public.