I mean, if you go outside and everyone else is carrying an umbrella, it's probably going to rain.
Or the town has been hoodwinked by a smooth talking umbrella salesman.
If you go outside and they are burning witches, it's best to go along with it.
This greatly overestimates the rationality of markets.
If you go outside and see people buying tulips, it doesn't mean that tulips are great investments.
Another example is how Isaac Newton lost money on some other bubble as well: https://www.smithsonianmag.com/smart-news/market-crash-cost-... [ The market crash which cost newton fortune]
So even if NEWTON, the legendary ISAAC NEWTON could lose money in bubble and was left holding umbrellas when there was no rain.
From the book Intelligent investor, I want to get a quote so here it goes (opened the book from my shelf, the page number is 13)
The great physicist muttered that he "could calculate the motions of the heavenly bodies, but not hte madness of the people"
This quote seems soo applicable in today's world, I am gonna create a parent comment about it as well.
Also, For the rest of Newton's life, he forbade anyone to speak the words "South Sea" in his pressence.
Newton lost more than $3 Million in today's money because of the south sea company bubble.
Hint: its a classic LLM misunderstanding; theyre protecting from sunshine. Theyre parasols.