Is it really? Let's check out if it is or not!

Ponzi schemes use splendid promises and big words to entice people to invest in funding a non-existent company or fake concept. Such schemes collapse eventually when the total sum of funds obtained from the newer investors goes lower than the sum of returns needed to pay earlier investors.

Bitcoin has entirely different purpose and structure. It’s knowingly decentralized, and on its market value there are no promises, assurances or guarantees made. We’ll surely agree that Ponzi schemes lack essential value, we can see people sharing examples of how Bitcoin and the blockchain are providing practical and valuable solutions for everything from ways to store wealth to financial access for the un-banked to remittances.

Source: http://techcryptoguru.com/it-is-a-ponzi-scheme/