So basically they're accepting it's a Ponzi Scheme.
The term "ponzi scheme" get thrown around here far too easily. It does not mean what you probably think it means...
No one know the market actual Volume added everyday, so there maybe have a lot new dump everyday .
This not english.
At least the part about "no one know" is wrong, Ripple data is openly available and can be inspected by anyone. There's a nice (open source by the way) charting site at ripplecharts.com if you prefer not to stare at raw JSON data fresh from the API.