But every Ponzi scheme is a fraud, and crypto has multiple flavours of fraud using the misnomer of Ponzi but it's still adjacent (or part of the same superset "

But every Ponzi scheme is a fraud, and crypto has multiple flavours of fraud using the misnomer of Ponzi but it's still adjacent (or part of the same superset "fraud"). So if it's to be pedantic, your analogy is also rather flawed since a bank robber and rapist do not share much of a superset except for the larger "criminal" set (which "fraudster" is also part of).