What does Dionysus fear?

I'm going on my research and my imagination but i guess he could fear running out of wine or grapes to make wine. He may also fear Hera getting angry at him, being born of Zeus and Semele, and cursing him some other way other than the insanity she already inflicted upon him.

-Sources? My superior knowledge on Greek Mythology. and no. its not all from the Percy Jackson Series.