The big question is, Is this my only chance to get to Mars? Or am I young enough to get artificially longer life, to get round trip to mars? Or do I die before

The big question is, Is this my only chance to get to Mars? Or am I young enough to get artificially longer life, to get round trip to mars? Or do I die before it is possible? Can I live on Mars long enough for round trips to get frequent? Is science advanced enough to keep me live after getting back(c'mon, I am piece of history then, first ones on Mars, of course they are going to keep me alive if they can)? What are you betting on?