All of a sudden, popularity of a certain type of fish reached a booming high in Japan. Soon there was acute shortage of fish near coastal regions. By the time fishes reached shore they got stale. Because of the degraded quality and flavor, popularity of fish went down. 

Techniques of refrigeration were invented preserving of the fish started. But people didn't like the flavor of refrigerated fish. Some wise fishermen started cultivating fish in artificial ponds but surprisingly popularity of fish started plummeting again.

After years of research and experiments, reason for loss of taste/flavor in the tank cultivated fish was found. The fish in the open sea were creating certain protein out of fear of big fish - Shark. And this was not happening in the artificial pond ...

Many of us also get Comfortable to SAFE environment around us. But every time we hit the cusp/boundary, we have a chance to upgrade or be stuck in the same environment.

Don't form a Cocoon, Put a Shark in the Tank !