Ethereum is an awesome idea, but before any practical Ether application booms, it's more like a bubble.
If you're interested in why there's also a token named "Ethereum Classic(ETC)", you can search "DAO" on Google to explore more about why the first largest Ethereum application DAO was failed and why this leads to the hard fork(ETH => ETC, ETH) of Ethereum.
As far as decentralized storage is concerned, there's production-already a blockchain-based product named Sia (http://sia.tech/ ), but Swarm (which is a similar thing based on Ethereum) is still in very early stage.
If you're interested in why there's also a token named "Ethereum Classic(ETC)", you can search "DAO" on Google to explore more about why the first largest Ethereum application DAO was failed and why this leads to the hard fork(ETH => ETC, ETH) of Ethereum.
As far as decentralized storage is concerned, there's production-already a blockchain-based product named Sia (http://sia.tech/ ), but Swarm (which is a similar thing based on Ethereum) is still in very early stage.