Wow that is something out of the box thinking. I am not sure whether we can reward the time itself to anyone over the blockchain but I do know one thing that its not possible to live without currencies out here. The method of trading things has started since long time ago, it could even date to dark ages where people used to trade food. Later on it changed to valuable goods and then slowly currencies got started. May be this is impossible to overcome now as it is deep routed into the humans now.