They don't just believe in their selves, always doing copy trading which sometimes,
Copy trading is used by beginners that just want to gamble, they will end up losing just like you have said.
Another one are trading signals, the newbies will also later end up losing because they are just taking trading as gambling and just like receiving predictions.
There is nothing better than to learn trading and have the experience, using the money you can afford to lose.
The dangerous part is that sometimes they do not lose on the first days, which creates the whole problem. If they start sing on the first day, of the first hour, then they will end up stopping and looking for something else.
But, they turn their initial 1k dollar into 3k and then it becomes 80 dollars, so that 1k to 3k blurs their judgment and they end up being a bit more dangerously trading person. Copy trading doesn't give you losses right away at times, sometimes it does but at times it gives you profits, like gambling where you may earn your first few rounds but end up losing it all in the end. This is why I keep questioning the situation.
Without a doubt those that earn a little bit out of copy trading at the beginning are the ones that end up losing the most money, if someone were to try to use copy trading and they lost immediately then they will think it does not work and then find another way to trade.
But those that earn money at the beginning but then lose it all will think that there is in fact some potential in copy trading to allow them to make money, they just have to find the right person to copy, so they keep trying this strategy only to keep losing money to the markets.