Now I can't tell if you're trolling or not.
The only people who have mentioned the idea that "life is a dream" to me were either on drugs or had just finished watching the Matrix.
It's a ridiculous proposal. If dream food is nutritious, how come I didn't wake up satisfied when I'd eaten the most amazing dream chocolate fudge brownies in the world (before my age reached double digits)?

People who claim shared dreams exist are either lying, or kidding themselves, or on drugs, or all three.
Seriously stop watching sci-fi films, or at least don't base your perception of reality on them. It's not good for your health.