If i am a genie in a bottle, and i've given u one single wish in excange of ur life, what would it be? and why

I'm interpreting your question to state that as a genie you wish to have my life, though you don't neccessarily intend to end it but rather take control of it for your own purposes. So, if this intrepretation were correct then I'd gladly offer you my life in exchange for yours. If the meaning of your question had reference to other than this then I would say "thank you for the offer but I'll p and live without you".