There's a non-zero cost with making stock trades, keeping money secure, and transporting money into an ATM machine. There is a practical (as close as we can ge

There's a non-zero cost with making stock trades, keeping money secure, and transporting money into an ATM machine. There is a practical (as close as we can get) non-zero cost for moving bits around the internet. It seems like there should be a similar mechanism for building trust in the blockchain.