Best case scenario is that your startup succeeds wildly or the singularity leads to a world where finance is moot.

On the other hand, the singularity may end up being rubbish and your startups could flounder. Saving now and letting compound interest pile up is a way of hedging against this scenario. It doesn't take all that much to build up a reasonable nest egg should things go south. Here is a compound interest calculator if you're interested.

It's a personal decision whether you find certain scenarios likely enough to be worth hedging against.