The Earth and Sun are younger so in about 6 billion years when our sun begins to die that exoplanet won’t be a viable habitat for earthlings. Secondly, it is estimated that in about 3 billion years the Milky Way will collide with Andromeda galaxy, so again will not prove to be a viable habitat for the human race.
But we have no clue what the future holds.
In just 100k years, we could have found technology which would allow us to travel to any coordinates in the universe, instantly. In 200k years there may be a means to create livable planets from dead worlds etc...