Why Would God Hide?

[Smaug]

But accroding to the Bible Yahweh is omnipotent. Doesn't that mean that no finite action (physical or mental) could alter his state (i.e. hurt in any way)? And by the way, why an omnipotent being would objectively be in need of any kind of worship all along? The level of endurance of omnipotent being's self-confidence must be way above any harm that might be inflicted opon it by non-omnipotent beings. Why does he feel insecure regardless of omnipotence?
And there's another account of Yahweh's ungrounded(?) paranoia in Genesis 3. If he's omnipotent, there's no way Adam and Eve's actions were going to hurt them.