No sweat people, at a future point in time the sun will exhaust its supply of fuel and implode in on itself creating a vast atomic explosion (SuperNova)and incinerate whatever is left of this planet. The sun has a expected life time of 10 billion years and the sun is 5 billion years old. You do the math
At a future point in time, 15 trillion years some say, the universe will have exhausted its fuel and die.
As the cosmos has a birth and a death, so do all creations contained therein, obviously including the entire human race.
Even if Capt Kirk were ever realized. there is no escaping the finality of death ona personal, global and comsic scale.
Enjoy your life, be prepared to die defending the quality of it, the freedom to believe what your mind wants.... but above all else find and make love.