put all one's eggs in one basket

There's an old saying about not putting all one's eggs in one basket."

A second set of models examines the possibility that iteroparity is a hedge against unpredictable juvenile survivorship (avoiding putting all one's eggs in one basket).

Second priority is not to put all one's eggs in one basket, (forgive the cliche) capital markets are not always successful and traditional farming is an essential contingency plan.