Yes agree with you. Bitcoin existence can prove that it is quite different to Ponzi scheme. Ponzi scheme will not really exceed for long term like 9-10 years in operation. And besides bitcoin transactions or investment will collecting charges to enables investors doing trading, exchanging and etc, or a decentralized forms of investment generally. Unlike ponzi scheme it is a pyramidal form that operates in short time and vanished with all of our money were being steal.
Yes, I would definitely agree with the author of this thread wherein Bitcoin is not a Ponzi scheme. I guess this people who had believed that is a ponzi scheme were those who are not very familiar with it and lack of knowledge. Bitcoin is a digital currency and a payment system where beginners should know about it's function in the crypto market. I would assume that those ICO's that has been launching their coins and yet many investors had put in some huge investment on it then later it had gone like a bubble and left the investors for good is where I consider a Ponzi scheme.