A lot is possible on the blockchain. But, the blockchain does not have power to solve every problem thrown at it.
Diamond provenance protection, asset trading, land title registry, passport issuance, smart contracts, currency... you name it, there is already a startup building the solutions for it on the blockchain (the decentralized public ledger that underlines most cryptocurrencies, including Bitcoin). And the list of possible opportunities that the technology has to offer seems to grow longer each passing day.
As a matter of fact, it is now almost a given that at every Bitcoin meetup, conference or forum you attend, there will be someone who sees it as the right place to let the world know of the new blockchain innovation they have been working on. What's more, the impression that there is nothing that can't find a solution from the distributed ledger technology has done more than take hold in the Bitcoin community. It is now catching on with the mainstream financial institutions, technology companies and even beyond.