You use the expression ‘Don’t Put All Your Eggs in One Basket’ to indicate the
importance of not putting all of your resources into one endeavor.
Example of use: “I really want to buy that house, but it will eat up my savings.” Answer: “Don’t put all your eggs in one basket. It’s probably better to wait until you’ve saved a bit more.”
There is some controversy over the origin of the phrase ‘Don’t put all your eggs in one basket.’ The expression is most commonly attributed to Miguel Cervantes, who wrote Don Quixote in 1605.