Should NASA Go to Mars?

Eventually the sun will use up its fuel then rapidly expand and engulf the Earth ridding it of all life. So for life to go on we eventually need to expand and explore and migrate from mother Earth. But we still have a billion years to go before that happens so maybe it might be better to put off making progress on the project until economic times are not as tough as they are right now. A decade or too of wait wont make any difference and Mars isnt going anywhere. This is one of those things that can wait awhile on the back burner without hurting anything.