I was highly skeptical about blockchain as well because the only practical application seemed to be cryptocurrencies, and those will never be allowed to grow to a point they become dominant (they can be regulated in such a way normal people won’t want any).

But ... then I went to an evening where the identity applications were explained. Using a blockchain to have assertions made about your identity, like where you studied, where you were born, what employer’s you’ve had in such a way that the assertions can’t be forged, can’t be doctored, can’t be stolen, and aren’t locked away in the databases of an institution. I heard stories of people who lost their proofs of identity by having to flee a warzone and were unable to prove to EU governments and employers they were who they were (to the point of being stripped of their bank accounts because banks only let people with official paperwork hold accounts). And I have to say, there’s something there. I’m still skeptical about cryptocurrency, but not about blockchain.