Sia is a storage-backed cryptocurrency. SiaCoins are redeemable for storage bought from other users of Sia who host "farms"-- storage made available to the peer to peer cloud that is Sia.
https://github.com/NebulousLabs
Sia can be bought at exchanges like many currencies. It can also be mined using a GPU, which provides security to the Sia blockchain, just like mining ethereum does. Finally, and probably most commonly, Sia can be farmed by providing storage to the user community.
Sia can be used as personal cloud storage. More interestingly, Sia can be used as distributed storage for content oriented web sites, and more.....but the last time I tried this the javascript libraries were not too fresh. This might have changed since then, however. People building distributed video streaming solutions might be interested in storing files in sia and then streaming them out with the sia javascript libraries.
note: Please consider this a beta of the format that I'm trying to achieve for CryptoProfiles. I appreciate feedback on the format, content, and style of this article.
