I get where you're coming from but that link statement doesn't tally with what you've written. That link is talking specifically about Ponzi schemes which involve an individual or group 'personally' taking money from a person or people to pay off previous investors thereby creating a false impression of investment return.

Look Out for Potential Scams
Using Virtual Currency

We are concerned that the rising use of virtual currencies
in the global marketplace may entice fraudsters to lure
investors into Ponzi and other schemes in which these
currencies are used to facilitate fraudulent, or simply
fabricated, investments or transactions