Bitcoin... a monetary system that requires internet connectivity and CPU usage... in which every transaction is recorded forever and the database is replicated by all participants... is "off the grid"?
(Disclaimer : I'm a fervent Bitcoin supporter, I like its pseudonymous property and discard any anonymat claims. I've never used zerocoin because I don't have any use for it.)
But libzerocoin is coming tomorrow: https://mobile.twitter.com/ZerocoinProject/status/3521365613...