Don't put all your eggs in one basket you should not chance everything on a single venture, but spread the risk. Saying recorded from the mid 17th century; reworked by Mark Twain in Pudd'nhead Wilson (1894) as, ‘Put all your eggs in the one basket, and—watch that basket.’
kill the goose that lays the golden eggs destroy a reliable and valuable source of income; the allusion is to one of Aesop's fables, in which a man killed the goose which laid a single golden egg each day in the belief that he would find a number of eggs inside it, and instead through greed lost his source of wealth. (See also golden goose.)
See also egg, you cannot make an omelette without breaking eggs, there is reason in the roasting of eggs, don't teach your grandmother to suck eggs.