Bitcoin users are exceptionally gullible? I'm going to need a source on that one.
It's a lot like that.
Both types of trading (crypto and public market) are gambling. The difference is that some public securities have intrinsic value (dividends and voting rights), whereas crypto mostly doesn't.
If bitcoin only were silly technologists playing around with pie-in-the-sky software projects, that would be one thing. But people's money is being stolen. Lives are being ruined, for real. Real people suffer because of this technology, and criminals prosper.
That is an objective evil. The sooner bitcoin dies, the better for humanity.