You're hearing a lot about bitcoins and cryptocurrency "altcoins" a lot lately because it's about to change the world's financial systems.
It's not just digital currency. The blockchain technology has real world uses, too.
ironically, if Bitcoin etc. continue their growth, eventually we'll need central authorities just to hold and process all the data because individuals will lack the required resources
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Check out this Article for more detail :
https://thenextweb.com/syndication/2018/01/21/bitcoin-future-will-always-end-centralization