INTRO Time, seems to never run out.
Most of the time we normally rarely think about time on a grander scale other than ourselves, let alone on a existential level.
It's just a matter of how much time left do I have until the game on TV begins, or How much time I have left to complete my assignments.
But what about the very time limit on our own lives!?
How much Time do we have left as a individual person until our time limit arrives and we cease to live?
How much time left do we have as a Species?
Or How much time does this very universe have before it ends?
When does the Multi-verse end? Is there an End?
THE TIME LIMIT PART 1- TIME LIMITS WITHIN SPACE. CHAPTER 1- the fate of the universe.
For starters, time is finite.
The reason why I say this, is because "before" the universe there was no Space-Time, but only "Space"because the universe had not "Began/Started" expanding yet which means that Time hadn't started yet.
Think of the universe like a bad mitten shuttle cock. The Time Portion represents current "Real" and growing time. The Imaginary time portion means that space isn't expanding which means that it isn't growing which means 0 time, and only imaginary human counting of days time exists/
Now its generally agreed in the AstroPhysics community that the universe will eventually end in some form of fashion.
The 3 Big theories on ways the universe will probably end in are-
BIG RIP- the matter of the universe, from stars and galaxies to atoms and subatomic particles, and even spacetime itself, is progressively torn apart by the expansion of the universe at a certain time ...
BIG CHILL- In this scenario, the universe would continue to expand, but its density would decrease. While old stars would burn out, new stars would no longer form. The universe would become cold and dark.
BIG CRUNCH- the expansion of the universe eventually reverses and the universe recollapses, ultimately causing the universe to collapse into a space time singularity (Absolute 0 space and time). Some have even proposed that if the universe would collapse, than perhaps it would be reborn in a eternal loop of death and birth.
Now, that sum of information was probably very depressing and frightening.
But don't worry it will be a couple billion years until any such apocalyptic event should occur based on current studies.
So you're not pretty much not a risk at all from such a event. You have no need to worry.