Everyone who is alive today knows what it is like to not exist, essentially to be dead. Given that the age of the universe is currently estimated at about 13.8 billion years, there has been 13.8 billion years when we (no one) existed. Our current existence is but an aberration to the grand universal scheme of things. With each second, the universe is getting older and at some point it will be 100 billion years old, 1 trillion years old, etc. At these time horizon, it almost certain that there will be no place called "the earth" in which humans inhabit, given that our sun is set to run out of energy and self-destruct in about 6 billion years and that our galaxy (the Milky Way) is fixed on a collision course with our galactic neighbour, Andromeda, in about 20 billion years. Galactic collision and star explosion a dime a dozen in the universe, there is no reason why our planet, sun and galaxy would be spare from these events. Life as we know it would be only a very distance memory, that is, if atoms, electron and neutron can have memories.

Recent cosmological measurements show the universe expanding are a greater rate. Basically, the universe is accelerating away into nothingness. Given the accelerating universe, cosmologist predict that the will come a point when all matter in space will be stretched out and very thinly diffused that gravity will no longer be capable of holding matter together. All matter will be converted into atom, then to electron, neutron, and then to "nothing". Essentially, matter would have been converted back into energy according to Einstein popular equation E = mc². From energy matter came, to energy matter shall return. This stage of nothingness is estimated at about 100 trillion years in the future.

How does all of the foregoing compare with our miniscule moment of existence? Let's conservatively assume humans will exist on the planet until the sun's demise, ie in 6 billions years. Compared to 100 trillion, this is but a tiny fraction of time available for matter in the universe. Basically we shall be in non-existence for a great deal longer than we have been before.

Are you panicked by this very long period of non-existence? Why would you be? We had non-existed already for 13.7 billions years, yet we do not have regrets about that.

Reference

The End of Cosmology, an accelerating universe wipes out traces of its own origins, Lawrence M Krause and Robert J Scherrer, Scientific America, March 2008, page 35 - 41.

To whom tolls the bell?.
dont go nuts dear friend, but here goes.
It never was nor is.
now breathe and enjoy for u are IT.