1. make everything dependent on one thing at the risk of losing it all
don't put all your eggs in one basket
The idiom 'to put all your eggs in one basket' is used to advise caution about being dependant on one thing. The thinking is that if you are buying eggs and transporting them somewhere you might like to put them in a few different places as if something happens to 'the basket' all of the eggs will be broken and you will be left with mo eggs at all. This idiom suggests that diversifying investments and risk is a better approach. Making all of your hopes dependant on one investment can lead to disappointment and you might be left with no backup plan if things don't go well. "I really want to get into Oxford but I have applied to a few other universities as well - It's better not to put all your eggs in one basket."