How anyone who Say Can proof Bitcoin is not ponzi?
There is More proof and evidence that it is ponzi.
I Don't mind If its ponzi but i Don't want to exit too late but not too early so When is best time to exit?
From the looks of everything and existence of bitcoin, btc never used or known as ponzi scheme, but you emphasised that bitcoin is a ponzi I think you have to let us understand the aspect you comprehend that made bitcoin to be ponzi from your perspective, but remember that if btc can be classified as ponzi from your findings, it's obvious that money is also a ponzi.