Blockchain have a few characteristics that make them unique: - they are database - they are distributed - everybody has the entire db - it's transparent: ev

Blockchain have a few characteristics that make them unique: - they are database - they are distributed - everybody has the entire db - it's transparent: everyone see the content - it's temper proof - it has a notion of temporality - it has a notion of transactions, and each transaction has a unique id and an history - transactions have authors, sources and destinations, with unique identifiers that can't be faked. Hence it's a transaction based system that is a source of truth that can be audited from end to end by anybody. So the only applications that are interesting for the blockchain are the ones mapping to this EXACT concept. Otherwise, you don't need a blockchain. But because of the bubble, people are now using the blockchain for everything, since that gives visibility. I have friends myself that have projects making ICO just for that. And it works. Their product clearly didn't need a coin, but they raised several millions of euros to build their stuff. Ok, so what kind of project DOES match the blockchain paradigm? So money, obviously is a contender. But voting systems as well. Or a mix of both, such as betting (see the wagger project). Compliance systems are another use case. E.G: make a public database of all plane inspections or food products origin. Being decentralized doesn't mean blockchain systems don't have central authorities. The decentralized nature mean the data access (and potentially production) is not on a central system, which has great benefits. But as soon has you need human actions, you need something to tell them in which direction to go. So you need a central authority for the part dealing with the humans. E.G: for the voting system, something to register the citizen and produce the polls. For the betting system, something to introduce the bet results into the blockchain. Etc. One alternative to that we are experimenting with currently as a community is the use masternodes (POS machines holding a lot of coins out of the market for a long period of time to show their commitment). It's basically an oligarchy. The coin Polis is an example of that: they make proposals of things to finance, and each masternode vote yes or no for the proposal. They are a lot of masternode coins, now, for various uses. Zencash uses them to distribute the messages of its chat system, wagger to introduce the data from bets into the chain, etc. But most of the masternodes are just used to increase the ponzi effect (we build and host masternode for our clients as a service so we have a large sample of them on our servers).