A bird in the hand is worth two in the bush.

The proverb favors something already within reach over a more attractive possibility that remains uncertain. The contrast is between what is secured and what is merely hoped for.

It does not say that taking a risk is always foolish. Rather, it asks whether the potential reward is valuable enough to justify giving up what you already have.

Use it when someone must choose between keeping a definite benefit and pursuing a potentially greater but uncertain one. It can also temper enthusiasm for a promising offer that would require surrendering a reliable option.