They invest cloud mining, sites that doubles BTC and of course gambling are the mistakes committed by most of the newbies in BTC. I don't really bla,e them cos many of us threaded this path on our way to becoming professionals
In other words, people are too dumb to understand that what they are doing leads to nothing but losses, and too lazy to freaking work hard for their money.
All the examples you mentioned are something that people (rookie or experienced) should avoid by default. It's common sense material......
If people need to go wrong in order to realize that these options aren't rewarding, and only lead to losses, it tells me that the average IQ of the general user of this forum is far below average.