system
A chat on subreddit /r/wallstreetbets
human
These aren't RSUs are they? Looks like an ESPP (you put in money and after each quarter you get to purchase stock a % discount).

gpt
They could still be RSUs. His screenshot is from the E*Trade mobile app's Stock Plan Overview screen and that groups up ESPP and RSUs in the Total Account Value and Day's Change. 
  
 Doesn't change the fact he's sitting on a 13m account but if they're mostly RSUs he'll lose nearly half to taxes as they vest over the next 4 or so years.