In the Middle Ages the rich people of the time were donating almost all their wealth to the Church on their dead-beds because they were afraid of eternal death, nowadays rich people throw a lot of money on bogus stuff like the one described in here hoping that they would actually get to live forever but in the end they'll still die (and I suspect the Middle Age rich guys' souls still didn't get to live forever on account of there not being anything after physical death).
There is no concrete reason to believe immortality through tech won't happen in the next 100,000 years. They eventually will live forever. This isn't like a speed of light limit, at least none that we know of.
Of course there is. Humanity is likely destroy civilization and/or its environment within the next 100,000 years, assuming a meteor doesn't take us out.
