don't put all your eggs in one basket

don't put all your eggs in one basket

Don't focus all of your attention on one thing or in one area, in case that situation changes or goes awry. I know you love Harvard, but don't put all your eggs in one basket—make sure to apply to several other schools too. Don't put all your eggs in one basket with your investments. Make sure you diversify your portfolio.
See also: all, basket, egg, one, put