Heres one to keep a close eye on, Cloud Nine Web3 Technologies Inc (CLGUF) They just IPO'd in January, they are creating software that will be downloadable to a computer or cell phone and will use the unused space on those devices to mine for Bitcoin or the users choice of crpto currency. So basically people will just be trading their unused computer space to mine for crypto's and I beleive its a 50/50 split for Cloud 9 and the end user. Basically free crypto for the end user and they dont have to do anything... Can you say "free money" I think people will eat this one up with a spoon.