system
A chat on subreddit /r/wallstreetbets
human
Ding ding ding, consumers are leveraged, but they will just pile on to the problem when jobs and money become scarce, I think the origin will be corporate in nature. Tying into the other observations in the thread, tech is just one example of an industry where too many players have become heavily reliant on cheap, easily accessible debt.

gpt
There are stocks with negative revenue who are $100 lol