"And the beauty of the deal: no one is responsible. Because everyone is drinking the same Kool Aid."
--Gordon Gekko (Wall Street: Money Never Sleeps)
Q: When do people broadly recognize financial market bubbles? A: Afterwards.
As demonstrated here, warning signs continue to flash. Unfortunately, they make no nevermind to people as long as prices march higher.
When it all comes crashing down, it is then that people will 'see' the bubble.