It's just because they're selfish and arrogant. Nonetheless, we can't predict when someone will turn into a greedy creature and then abandon the scheme, but it's really wrong to trust our fund to someone else first. If you're puzzled about why people can easily get scammed that way, you'll need to see those people who've entered multi-level marketing or ponzi schemes. They're stupid enough to believe the word of a stranger as if it's like being a scam target.
People definitely get scammed because of their own ignorance and at times too much greed. They want simple money where they dont have to spend a lot of time and no hard work is required. What I believe is that these people shall stay vigilant in the market which is full of projects and do proper detailed research before making any sort of investments or else they will keep getting scammed.
in the end they will also be discouraged if they continue to get real and recurring losses, many of my friends realize that they are just wasting money based on greed and quick profits, and finally choosing to do swing trades manually, it's not good to try to depend on other parties whose responsibilities are unclear.