The basic underlying idea behind the use and creation of cryptocurrency is to present financial freedom to everybody no matter where you find yourself in this world. But the volatile nature of these digital currencies got me thinking, what if the whole idea of blockchain and cryptocurrency is just one giant Ponzi Scheme? Within a short period of time, there have been about thousands of cryptocurrencies created. Majority of these digital currencies are either trying to solve problems of a particular cryptocurrency by presenting solutions they think can help improve financial freedom. This usually gets me wondering and thinking. If you don't agree with me on this, please share your thoughts... 
Peoples are free to call bitcoin is ponzi scheme and if they believe so, they should leave bitcoin in the first place.
But bitcoin actually have a real usage in our world, as a currency. Although bitcoin is not a stable currency,
it has been used as a payment currency since 2009. So for me, it is not a ponzi or something like that.