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?
LOL are you serious?
You shouldn't compare Bitcoin with a ponzi scheme the proof that you are talking about are the early investors right they earned what they gained by having faith on Bitcoin.
Nobody promised anything when you invested in Bitcoin or buy some Bitcoin unless you are one of those who just invested because of the profit that has been shown by others or been interested because they heard or read some people become rich due to Bitcoin or crypto.
You should try to research more in order to have deeper insight not just some useless proof that you are talking.
Then would you also call a stocks that has been pump a ponzi? would everything that would gain value in the future be considered as a ponzi for you?