Private is the default right now. There's no particular upside to being public at this point.  You can keep more secrets if you're a private company.  And what happens to your ability to raise money if impatient investors beat your stock price into the dirt.  Perhaps they'll go public when there is an event, as RVXoldtimer noted.  But, there are other ways to get $$$ in your pockets as DM described in the AGM question period (22:00).