Speed is almost certainly the best available attribute from the sim that could be applied to real life. Imagine if you could write paragraphs like this just to make yourself run faster. 2000 tpe later and you now have no need for traditional travel methods, you could run virtually everywhere and if you ran fast enough you could even just jump over oceans to travel internationally across the seas. Speed would make every day to day thing that much more efficient too. 10 minute showers turn into 10 second showers. 5 minute poops turn into 5 second poops. Not to mention how quickly you could get your work done - 8 hour days down to 8 minute days leaves so much extra time for relaxation and getting yourself more tpe for speed. Once you're moving near the speed of light you can start using all the time you save to level up other stats, like Stamina. I imagine moving that fast would be pretty Stamina draining so you'll need to balance it out a little and save some TPE there.