If Science offers us the chance, why should we refuse eternal life?

personally i feel fifty is old enough i can barley hold it together as is, death tho unwanted is your get out of jail free card, imagine the implications you would have to work forever no way out, even if you won the lottery it would not last, besides evolution would not stop because aging did your great great great great grandchildren looking at you like cromagnon man, it might be cool for awhile but it would get old quick