I'm not against ponzi's.
One have just to know the principle.
the principle is:
Last ones pay for first ones.

I one knows this then I can not understand that people are against this system.

It is just a "BET GAME" where you bet that you are not among the last ones...

Ok if the ponzi runner is a scammer...then we are out off topic...
Scammers can run every where...

You have to take the bluff part...
Same in poker (lol)
If people encourage you to invest in a ponzi...perhaps they have invested before you or have referrer interest.

It is why you have to overwiew all possibilities...or go away...

Have fun...and know that often comments here are "no-sens" given by people who just want to write something to get sign camp reward (lol)