Honestly If anyone just come into crypto space through a link or online ads it's easier to get lost and fall victim to scams, i never get hacked for once or lost money to scam projects simply because I favoured learning things I don't know anything about, why can't people be like this either? This will easily safe you from money doubling schemes and Ponzi schemes, please newcomers and members, be more willing to learn.
Greediness, ignorance and lack of patience is usually the cause of many newbies falling victims to this ponzi schemes, claiming to be money doublers either via investment, mining or trading which are obviously false claims then promise paying certain percentage based on time period stated on their sites. The problem isn't that these warning aren't clear for those who want to be safe to get rescued but the gullible Investors are just after the profit without wanting to learn first.
The industry is still very new and new ideas/solution are been tested frequently, if you think you know it all, you'll easily get left behind as solution you thought are the best yesterday can easily get replace with better ones tomorrow.