In 2011, pi was computed out to 10,000,000,000,000 decimal places. Here are 4,000,000 of them, translated into colored pixels corresponding to digits 0-9 (this is only part of it, explore the full image here).
It only takes 39 digits of pi to draw a circle the size of the universe down to the accuracy of a hydrogen atom, so we’ve got about 9,999,999,999,961 extra to figure out what to do with. This visualization only covers 4e-5% of all known digits of pi.
At a normal reading pace, it would take you 158,000 years to recite all known digits of pi. Better start practicing!