For years and years, some people thought Mel Fisher was running a scam or con. He'd have people invest in has salvage operation for a share of the finds. My parents had an opportunity to invest but decided to use their money to buy another boat. So, for years and years and more years, there were those who thought he was a fraudster, running a scam, collecting money from a lot of "unsuspecting victims".
And then, he found the Atocha...
And all those investors who took a chance, were very, very, VERY happy. It's only considered a "scam" by some until the treasure is found.