I'm a pragmatist, so anything which makes survival easier has value. Everything else is fun and games (not important enough to build businesses around and charge money for). Personally, I think it would be good to have two economies - a 'core' economy where there is a gold standard, currency can only be traded for essential goods and patents and speculation are strictly forbidden. Then a 'extra/luxury/optional/nice-to-have' economy for all the rest which does allow a more fragile currency, speculation and what-not.

If you want food, produce something which will help someone else survive. If you want want to play around and relax, create something which will help other's do the same. Trade what you produce for what you require.