Oh, it works as a distributed ledger (that is already proven).

I just fail to see how it is better than so many other alternatives on a case-by-case basis... mostly on efficiency...

And just because I don't believe in the idea itself, I acknowledge that some good can come of it..

See for example wars, where most cutting edge innovation happens. I think wars are bad (but sometimes necessary), but we are reaping the benefits of generals wanting to throw more cannonballs further (If you are unsure I mean our computers where developed mostly because of that), also microwaves, the internet (a cold war though) and lots and lots of other stuff...