Secret money (if you know what I mean) - can you trust it?

I'm using the words "secret money" but you know what I mean - c----------y.

"When are you going to give us your opinion?", literally no-one has been asking. I had some vague thoughts, which never got anywhere. I mentioned this in the comments on Tim Bray's post on AWS and Blockchain. 

"If I could get some coherent thoughts on it I would write something about "you've got to trust somebody", like the person who created that executable that's your on-ramp to the blockchain."

Doug K said

"Bruce Schneier wrote that coherent essay, look on his website for the post Blockchain and Trust."

Here it is: Blockchain and Trust.

 "What blockchain does is shift some of the trust in people and institutions to trust in technology. You need to trust the cryptography, the protocols, the software, the computers and the network. And you need to trust them absolutely, because they're often single points of failure."

Thanks Bruce, for putting it so well.