system
A chat on subreddit /r/wallstreetbets
human
A friend of mine went hardcore on the rental property and had 40+ condos.  Not in one building, just all over renting it out.  He lost it all after 2008 when he had to kick people out who trashed the rentals after not paying for 6 months.
gpt
...and then he started bagging groceries...to buy a house...