I have read that objects with non-zero rest mass cannot attain light speed $c$. But for the sake of this question let us assume that Mr. X can get as close to $c$ as he wants. So this means that an observer watching on from Earth see his time pass by normally whereas time slows down for X. No matter how many billions of years pass by in Earth only a few milliseconds pass by for X (obviously he doesn't realize anything).
Now consider that Mr. X never encounters any obstacles in his path to stop him. Will he reach the end of the universe - almost instantaneously in his own experience - both from the perspectives of time and space?
Note: I am imagining if the end of the universe was to occur it would somehow reduce X's speed significantly so that he will start to experience what is going on around him again.
EDIT : I am not altering the original question because some of the comments indicate that a few of our friends have understood what I actually meant.
To clarify, this article explains some of the possible theories for end of the universe https://en.m.wikipedia.org/wiki/Ultimate_fate_of_the_universe
Back to the questions,
- Will Mr. X witness any of these events?
- If the Universe has no end will he reach the edge of the universe (assuming it is finite)?
Please consider that Mr. X has a technology that will accelerate him close to $c$ and we need not bother about how he did it.