experienced members its a good thing but there's always a high risk on ponzis, some pay on the start then will surely scam after some days or weeks of paying, and worse, some don't pay anyone at all, that's why it was never recommended.
ponzi schemes are just an extremely high risk gambling. they should not be called investment at all. because there is a low chance of (for example) doubling your coins while there is a big chance of losing.
you might as well bet on dice with 2x multiplier instead of using ponzi, you get the results right away instead of waiting a set amount of hours.